Research: John T. Welch

Authored and Edited Books | Monographs | Book Chapter | Research | Patents

Research 2004- 2007

  1. R. U. Claessen, A. M. Kornilov, K. K. Banger, S. C. Ngo, S. Higashiya, C. C. Wells, E. V. Dikarev, P. J. Toscano, J. T. Welch, "Investigations into the Preparation of Sila-Β-diketones via 2-Trimethylsilyl-1,3-dithianes: Structural Characterization of a Second Polymorph of Bis(2,2,6,6-tetramethyl-2-sila-3,5-heptanedionato)copper(II)." J. Organomet. Chem. 2004, 689, 71-81.
  2. W. J. Chung, and J. T. Welch, "A general method for synthesis of trifluoracetytrialkyl(aryl)silanes and the Sakurai reaction of fluorinated acylsilanes." J. Fluorine Chem. 2004 125, 543-658.
  3. T. Tang, B. Xu, J. T. Welch and J. Castracane "Cantilever Based Mass Sensor for Immuno-detection of Multiple Bioactive Targets." Proc. SPIE (SPIE - The International Society for Optical Engineering), 2004, 5345, (Microfluidics, BioMEMs, and Medical Microsystems II), 89-97.
  4. W. J. Chung, S. C. Ngo, S. Higashiya and J. T. Welch, "Lewis acid promoted aldol reaction of fluorinated silyl enol ethers" Tetrahedron Lett. 2004, 45, 5403-5406.
  5. S. Higashiya, W. J. Chung, D. S. Lim, S. C. Ngo, W. H. Kelly IV, P. J. Toscano, and J. T. Welch, "Synthesis of mono- and difluoroacetyltrialkylsilanes, and the corresponding enol silyl ethers" J. Org. Chem. 2004, 69(19), 6323-6328
  6. A. Carlsen, S. C Ngo, S. Higashiya, C. Kossow, N. I. Topilina, C.C. Wells, D. Cheng, V. Ermolenkov, J. Raynolds,; K. Dunn,; E. T. Eisenbraun, A. E. Kaloyeros, I. Lednev, R. E Geer, J. T Welch.. "Metallization of polypeptide arrays for molecular interconnect applications." Polymeric Materials: Science and Engineering 2004, 91 474
  7. K. S. Bousman, P. J. Toscano,* and J. T. Welch, "The Effect of Sulfur on CVD Performance of Pd(II) Beta-diketonate Precursors and the Completion of a Structural trans-Influence Series: Synthesis and Structural Characterization of Pd(S,S-tmhd)2 Inorg. Chim. Acta, 2004, 357(13), 3871-3876.
  8. W. J. Chung, M. Omote and J. T. Welch, "The catalytic Mannich reaction of 1,1-difluoro-2-trialkyl(aryl)-2-trimethylsilyloxyethenes: Preparation of Β-amino acid derivatives." J. Org. Chem. 2005, 70, 7784-7787.
  9. Topilina, N. I.; Higashiya, S.; Rana, N.; Ermolenkov, V. V.; Wells, C. C.; Carlsen, A.; Kossow, C.; Dunn, K.; Elsenbraun, E. T.; Kaloyeros, A. E.; Geer, R. E.; Lednev, I. K.; Welch, J. T. "Genetically engineered self-assembling polypeptides." PMSE Preprints 2005, 93 688-689.
  10. Liu, X.-Y.; Raynolds, J. E.; Wells, C.; Welch, J.; Cale, T. S. "First-principles modeling of electronic transport in pi-stacked molecular junctions."J. App. Phys. 2005, 98, 33712-6.
  11. J. T. Welch, S. Higashiya, S. C. Ngo, N. Rana, V. Ermolenkov, C. Kossow, A. Carlsen, K. S. Bousman, C. C. Wells, E. T. Eisenbraun, I. Lednev, R. E. Geer, and A. E. Kaloyeros "Novel Nanofibril Formation Motif by Genetically Engineered Polypeptides," Biomacromolecules., 2006, 7, 1104-1111.
  12. I. L. Medintz, K. E. Sapsford, A. R. Clapp, T. Pons, S. Higashiya, J. T. Welch and H. Mattoussi "Surface Immobilization of Quantum Dots" J. Phys. Chem., 2006, 110, 10683-10690
  13. I. K. Lednev, V. V. Ermolenkov, S. Higashiya, L. Popova, N. I. Topilina, and J. T. Welch, "Reversible Thermal Denaturation of a 60-kDa Genetically Engineered Β-Sheet Polypeptide" Biophysical Journal, 2006, 91, 3805-3818
  14. O. Zimhony, C. Vilchze, M. Arai, J. T. Welch, and W. R. Jacobs Jr. "Pyrazinoic Acid and Its n-Propyl Ester Inhibit Fatty Acid Synthase Type I in Replicating Tubercle Bacilli" Antimicrobial Agents Chemother., 2007, 51, 752-754.
  15. S. Higashiya, N. I. Topilina, S. C. Ngo, D. Zagorevskii, and J. T. Welch "Design and preparation of Β-sheet forming repetitive and block-copolymerized polypeptides." Biomacromolecules, 2007, in press.
  16. S. C. Ngo, O. Zimhony, W. J. Chung, H. Sayahi, W. R. Jacobs, Jr. and J. T. Welch. "Inhibition of M. tuberculosis fatty acid synthetase I isolated from M. smegmatis by pyrazinamide analogs." Antimicrobial Agents Chemother. 2007, in press.
  17. D.S. Lim, J.-S. Choi, C. S. Pak and J. T. Welch, "Synthesis and Herbicidal Activity of a Pentafluorosulfanyl Analog of Trifluralin," J. Pesticide Science, 2007, in press.

Research 2000- 2003

  1. O. Zimhony, J.S. Cox, J.T. Welch, C. Vilcheze, W.R. Jacobs Jr., "Pyrazinamide inhibits fatty acid synthetase 1 (FAS1) of Mycobacterium tuberculosis." Nature Medicine, 2000, 6, 1043-1047.
  2. R.U Claessen, J.T. Welch, P.J. Toscano, K.K. Banger, A.M. Kornilov, E.T. Eisenbraun, and A. E. Kaloyeros, "The 2,2,6,6-Tetramethyl-2-Sila-3,5-Heptanedione Route To The Chemical Vapor Deposition Of Copper For Gigascale Interconnect Applications," Mater. Res. Soc., Symp. Proc. (Materials, Technology and Reliability for Advanced Interconnects and Low-k Dielectrics) 2000, 612, D6.8.1 - D6.8.6.
  3. K.K. Banger, A. Kornilov, R. U. Claessen, E.T. Eisenbraun, A. Kaloyeros, P.J. Toscano, and J. T. Welch. "Facile Preparation and Isolation of the Sila--diketone, 2,2,6,6-Tetramethyl-2-sila-3,5-heptanedione: The Influence of Silicon Substitution on the Volatility and Chemical Vapor Deposition Properties of the Cu (II) Complex." Inorg. Chem. Commun. 2001, 4, 496-500.
  4. K.K. Banger, P. Lim, P.J. Toscano, and J.T. Welch, "A Facile Synthesis of 2,2,6,6-Tetramethyl-2-germa-3,5-heptandione: The Preparation and Characterization of the First Germa--diketonate Copper(II) Complex. Organometallics, 2001, 20, 4745-4748.
  5. W.J. Chung, S. Higashiya, J.T. Welch, "The indium-mediated Reformatsky reactions of 2,2-difluoro-2-halo-1-furan-2-yl ethanones in aqueous media" J. Fluorine Chem. 2001, 112, 343-347. (invited contribution)
  6. S.C. Ngo, K.K. Banger, P. J. Toscano and J.T. Welch, "Synthesis and Physical and Structural Characterization of Ag(I) Complexes Supported by Non-fluorinated -Diketonate and Related Ancillary Ligands," Polyhedron, 2002, 21, 1289-1297.
  7. M.J. Dela Rosa, K.S. Bousman, J.T. Welch and P.J. Toscano, "Physical and Structural Characterization of Ce(IV) -Diketonate Complexes: Evidence for Geometrical Isomers in the Solid State." J. Coord. Chem., 2002, 55, 781-793.
  8. W.J. Chung, S. Higashiya, J.T. Welch, "Indium-mediated allylation reaction of difluoroacetyltrialkylsilanes in aqueous media," Tetrahedron Lett. 2002, 43, 5801-5803.
  9. H. Hata, T. Kobayashi, H. Amii, K. Uneyama,* and J. T. Welch "A new sequential defluorination route to -fluoro--unsaturated ketones from trifluoromethyl ketones." Tetrahedron Lett. 2002, 43,6099-6102.
  10. S. Ngo, P.J. Toscano, and J.T. Welch, "Preparation and Characterization of Monopentamethylcyclopentadienyl Titanium (IV) Triflate Complexes: Solid State Structural Motifs and Catalysis Studies." Helvetica Chim. Acta, 2002, 85(10), 3366-3382, invited contribution.
  11. S. C. Ngo, W. J. Chung, D. S. Lim, S. Higashiya, J. T. Welch, "Reactions of novel mono- and difluoroacetyltrialkylsilanes with sulfur and phosphorus ylides," J. Fluor. Chem. 2002, 117(2), 207-21 invited contribution.
  12. K. Zhao, J. T. Welch, "Nitrile Containing Fluoroolefin Dipeptidyl Peptidase IV Inhibitors: Synthesis and Enzyme Binding Studies." Bioorg. Med. Chem., 2003, 11, 207-215.
  13. A. E. Kaloyeros, E. T.Eisenbraun, J. Welch and R. E. Geer, "Exploiting Nanotechnology for Terahertz Interconnects," Semiconductor International, 2003, 26 [1], 56.
  14. S. C. Ngo, K. K. Banger, M. J. DelaRosa, P. J. Toscano and J. T. Welch, "Thermal and Structural Characterization of a Series of Homoleptic Cu(II) Dialkyldithiocarbamate Complexes: Bigger is Only Marginally Better for Potential MOCVD Performance." Polyhedron. 2003, 22, 1575-1583.
  15. Higashiya, S.; Ngo, S. C.; Bousman, K. S.; Jin, X.; Welch, J. T.; Cunningham, R. P.; Eisenbraun, E. T.; Geer, R. E.; Kaloyeros, A. E. "Efficient biological construction of repetitive polypeptides for interconnect applications by block copolymerization." Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) 2003, 44, 679-680.
  16. Higashiya, S.; Ngo, S. C.; Bousman, K. S.; Welch, J. T.; Rana, N.; Carlsen, A.; Eisenbraun, E. T.; Geer, R. E.; Kaloyeros, A. E. "Preparation and characterization of repetitive polypeptides for molecular interconnect applications" Polymeric Materials Science and Engineering 2003, 89 466-467
  17. S. Higashiya, K. K. Banger, S. C. Ngo, P. N. Lim, P. J. Toscano, and J. T. Welch, "Synthesis of Fluorinated -Sila--Diketones and Their Cu (II) Complexes." Inorganic Chimica Acta 2003, 351, 291-304.
  18. K. K. Banger, S. C. Ngo, S. Higashiya, R. U. Claessen, C. Birringer, K. S. Bousman, P. Lim, P. J. Toscano and J. T. Welch, "MOCVD Precursor Engineering: The Preparation and Physical and Structural Characterization of Novel Non-fluorinated -Sila--diketonate Copper(II) Complexes, Cu[R'C(O)CHC(O)SiR3]2, via the Facile Synthesis of the -Sila--diketones, R'C(O)CH2C(O)SiR3)." J. Organomet. Chem. 2003, 678, 15-32.
  19. Mark J. DelaRosa, Kulbinder K. Banger, Seiichiro Higashiya, Silvana C. Ngo, Daniel H. Hunt, Kenneth S. Bousman, Paul J. Toscano*, John T. Welch* "Structural investigations of copper(II) complexes containing fluorine-substituted -diketonate ligands." J. Fluorine Chem. 2003, 123, 109-117.
  20. W. J. Chung, S. Higashiya, Y. Oba and J. T. Welch, "Indium- and zinc-mediated allylation reaction of difluoroacetyltrialkylsilanes in aqueous media," Tetrahedron, 2003, 59, 10031-10036.
  21. M. J. DelaRosa, K. S. Bousman, J. T. Welch*, and P. J. Toscano, "Structural Investigations of Copper(II) Complexes Containing Unsymmetrical -Diketonate and Monothio--diketonate Ligands," J. Coord. Chem. 2003, 56, 1339-1349.

Research 1974- 1999

  1. G. A. Olah and J. T. Welch, Synthesis, 1974, 652. "Preparation of 2-Fluorocarboxylic Acids from Alpha-aminoacids via Diazotizations in Polyhydrogen Fluoride/Pyridine Solution."
  2. G. A. Olah and J. T. Welch, Synthesis, 1974, 653. "Preparation of Alkyl Halides in Polyhydrogen Fluoride/Pyridine Solution."
  3. G. A. Olah and J. T. Welch, Synthesis, 1974, 654. "Preparation of Alkyl Fluoroformates from Alkyl Carbamates via Diazotizations in Polyhydrogen Fluoride/Pyridine Solution."
  4. G. A. Olah and J. T. Welch, Synthesis, 1974, 896. "Convenient Dediazoniative Hydrofluorination and Halofluorination of Diazoalkanes and Diazoketones in Pyridinium Polyhydrogen Fluoride."
  5. G. A. Olah and J. T. Welch J. Am. Chem. Soc. 1975, 97, 208. "Heterolytic Dediazoniation of Benzenediazonium Ions by Halide Ions in Pyridinium Polyhydrogen Fluoride Solution Giving Isomeric Halobenzenes Reflecting Ambident Reactivity of Benzenediazonium Ions as well as Subsequent Aryne Formation."
  6. G. A. Olah, J. T. Welch and T. L. Ho, J. Am. Chem. Soc. 1976, 98, 6717. "Uranium Hexafluoride, A Convenient Oxidizing Agent for Organic Synthesis."
  7. G. A. Olah, J. T. Welch, G. K. S. Prakash, and T. L. Ho, Synthesis, 1976, 808. "Oxidative Cleavage of Hydrazones with Molybdenyl Chloride or Molybdenum Hexafluoride and Reductive Cleavage of Oximes with MoOCl3/Zn to Corresponding Carbonyl Compounds."
  8. G. A. Olah and J .T. Welch, Synthesis, 1976, 809. "Tungsten Hexafluoride, A Mild Oxidizing Agent for the Cleavage of Hydrazones."
  9. G. A. Olah, J. T. Welch and M. Henninger, Synthesis, 1977, 308. "The Oxidative Cleavage of Hydrazones and Oximes with Cobalt(III) Trifluoride."
  10. G. A. Olah and J. T. Welch, Synthesis, 1977, 419. "Selective Organic Oxidations with Iodine Pentafluoride in Trichlorofluoromethane Solution."
  11. G. A. Olah, M. Bruce and J. T. Welch, Inorg. Chem. 1977, 16, 2637. "The Convenient Preparation Sulfuryl Chloride Fluoride and Sulfur Tetrafluoride from Sulfuryl Chloride and Sulfur Dichloride with Pyridinium Polyhydrogen Fluoride."
  12. G. A. Olah and J. T. Welch, J. Org. Chem., 1978, 43, 2830. "Synthetic methods and reactions. 31. Oxidation of Olefins with Peroxouranium Oxide (UO4.4H2O)."
  13. G. A. Olah and J. T. Welch, J. Am. Chem. Soc. 1978, 100, 5396-5402. "Oxidation of Organic Compounds with Uranium Hexafluoride in Haloalkane Solution."
  14. G. A. Olah, J. T. Welch, Y. D. Vankar, M. Nojima, I. Kerekes and J.A. Olah, J. Org. Chem., 1979, 44, 3872-3881. "Pyridinium Poly(hydrogen fluoride) (30% Pyridine-70% Hydrogen Fluoride): A Convenient Reagent for Organic Fluorination Reactions."
  15. W. S. Johnson, D. Berner, D. J. Dumas, P. J. R. Nederlof, and J. T. Welch, J. Am. Chem. Soc. 1982, 104, 3508-3510. "Stereoselective Induction of Biomimetic Polyene Cyclizations by Remote Chiral Centers. Effect of a Pro-C-7 Substituent in Substrates leading to Steroidal Products."
  16. J. T. Welch, in Encyclopedia of Physical Science and Technology, Vol. 10, ed., Meyers, R.A.; Academic Press, San Diego, 1985, pages 70-87. "Organic Chemistry, Synthesis."
  17. J. T. Welch, B.-M. Svahn, S. Eswarakrishnan, J. P. Hutchinson, and J. Zubieta, Carbohydr. Res. 1984, 132, 221-231. "The Synthesis of 3-Acetamido-2,3,5,6-tetradeoxy-D,L-ribo-hexofuranose by the Direct Fluorination of O-Methyl-3-Acetamido-D,L-Acosamine."
  18. J. T. Welch and K. W. Seper, Syn. Commun. 1984, 14, 933-938. "Peroxouranium Oxide Promoted Oxidation of Olefins with Alkyl Hydroperoxides."
  19. J. T. Welch, S. Eswarakrishnan, K. Seper, and J. S. Samartino, J. Org. Chem., 1984, 49, 4720-4721. "Preparation of a-Fluoroenolates and Their Use in the Aldol Reaction."
  20. J. T. Welch and K. W. Seper, Tetrahedron Lett., 1984, 25, 5247-5250. "Diastereoselectivity in the Directed Aldol Reactions of 1-Fluoro-3,3-dimethyl-butanone Enolates and Enol Silyl Ethers."
  21. J. T. Welch and S. Eswarakrishnan, J. Chem. Soc. Chem. Commun., 1985, 186-188. "A Short Synthesis of 2-Deoxy-2-Fluoro-ribo-D-pentopyranose and 2-Deoxy-2-Fluoro-arabino-D-pentopyranose."
  22. J. T. Welch and B.- M. Svahn, J. Carbohdr. Chem., 1985, 4, 421-427. "Synthesis and X-ray Crystal Structure of Methyl aand b-D,L-Desmethyl Holantosaminide."
  23. J. T. Welch and K. W. Seper, J. Org. Chem., 1986, 51, 119-120. "The Temperature Dependent Regioselective Deprotonation of Fluoroacetone Cyclohexylimine."
  24. J. T. Welch and S. Eswarakrishnan, J. Org. Chem., 1985, 50, 5403-5405. "Improved Procedure for Introducing the a-Fluoroacetyl Group via the Directed Aldol Reaction."
  25. J. T. Welch and J. S. Samartino, J. Org. Chem., 1985, 50, 3663-3664. "Facile Diastereoselective Ester Enolate Claisen Rearrangements of Allyl Fluoroacetates."
  26. J. T. Welch and S. Eswarakrishnan, J. Org. Chem., 1985, 50, 5909-5910. "An Accelerated Diastereoselective Variant of the Amide Acetal Claisen Rearrangement."
  27. G. A. Olah, M. Bruce, F. Cluoet, M. Farnia, O. Farooq, G. K. S. Prakash, J. T. Welch and J. L. Koenig, Macromolecules 1987, 20, 2972-2976. "The Low Pressure Fischer Polymerization of Ethylene with Al + AlCl3 + TiCl4 revisited."
  28. J. T. Welch, Tetrahedron 1987, 43, 3123-3197. "Advances in the Preparation of Biologically Active Fluorinated Compounds."(Invited Review)
  29. J. T. Welch and K. W. Seper, J. Org. Chem., 1988, 53, 2991-2999. "Synthesis, Regioselective Deprotonation, and Stereoselective Alkylation of Fluoro Ketimines."
  30. J. T. Welch and S. Eswarakrishnan, J. Am. Chem. Soc. 1987, 109, 6716-6719. "Induction of Asymmetry by a Remote Chiral Center in the Amide Acetal Claisen Rearrangement."
  31. A. A. Craveiro, E. M. Nobrega, J. T. Welch, T. Nicholson, and J. A. Zubieta, J. Natural Products, 1988, 51, 962-965. "A New Alkaloid from Schultesia guianensis."
  32. J. T. Welch, J. S. Plummer, and T. S. Chou, J. Org. Chem. 1991, 56, 353-359. "Enolate Claisen Rearrangements of Allyl a-Fluoroacetates and a-Fluoropropionates."
  33. J. T. Welch and J. S. Plummer, Syn. Commun., 1989, 19, 1081-1090. "The Stereoselective Aldol Condensation Of a-Fluoroacetates."
  34. K. Araki, W. Q. Yun, J. O'Toole, P. J. Toscano and J. T. Welch, Carbohydr. Res. 1993, 249, 139-161. "The Synthesis of 2,3-Dideoxy-2-Fluoro-3-C-Methyl-pentose Containing Nucleosides via [3,3] Sigmatropic Rearrangements." (invited contribution)
  35. J. T. Welch, J. Am. Chem. Soc., 1989, 111, 9280-9281. "Current Contents on Diskette (IBM Version). (A Computer Software Review).
  36. J. T. Welch, B. De Corte, and N. De Kimpe, J. Org. Chem. 1990, 55, 4981-4983. "The Aza Cope Rearrangement of a-Halogenated and non-Halogenated Enamines."
  37. N. DeKimpe, W. Coppens, J. T. Welch, B. DeCorte, Synthesis, 1990, 675-677. "A convenient Synthesis of Aromatic a,a-Dichloroketones and the Corresponding a,a-Dichloroketimines."
  38. J. T. Welch and R. W. Herbert J. Org. Chem. 1990, 55, 4782-4784. "The Stereoselective Preparation of 2-Fluoroalkenoates."
  39. J. T. Welch, T. Yamazaki, J. S. Plummer and R. Gimi, Tetrahedron Lett. 1991, 32, 4267-4270. "The Enantioselective Amide Acetal Claisen Rearrangement of Fluorinated N,O-Ketene Acetals."
  40. M. H. Cynamon, S. P. Klemens, T. S. Chou, R. Gimi, M. McClinton and J. T. Welch, J. Med. Chem. 1992, 35, 1212-1215. "Antimycobacterial Activity of a Series of Pyrazinoic Acid Esters."
  41. K. Araki, J. A. Wichtowski, and J. T. Welch, "The Stereoselective Synthesis of 3-Fluoro-azetidinones," Tetrahedron Lett., 1991, 32, 5461-5464.
  42. J. T. Welch, K. Araki, R. Kawecki, and J. A. Wichtowski, "Stereocontrol by the Carbon-Fluorine Bond and Its Application to Asymmetric Synthesis" J. Org. Chem. 1993, 58, 2454-2462.
  43. K. Araki, J. T. Welch, "An Improved Procedure for the Ireland-Claisen Rearrangement of Fluoroacetates," Tetrahedron Lett. 1993, 34, 2251-2254.
  44. T. Yamazaki, R. Gimi, J. T. Welch, "An Optimized Synthesis of (2S,5S)-2,5-Dimethylpyrrolidine," SynLett. 1991, 573-575.
  45. R. Kawecki and J. T. Welch, "Free Radical Chain Reactions of 3-Fluoro-3-iodo-b-lactams" Tetrahedron Lett. 1993, 34, 3087-3090.
  46. K. Araki, J. C. O'Toole, J. T. Welch, "Synthesis of 3-Amino-2,3-deoxy-2-fluoro-a- and b-D-xylopyranoses and -xylofuranoses from 3-Fluoro-2-azetidinones," Bioorg. Med. Chem. Lett. 1993, 3, 2457-2460. (invited contribution).
  47. K. Umezawa, W. M. Gibson, J. T. Welch, K. Araki, G. Barros, H. L. Frisch, "The Case II Diffusion Study of Fluorinated Hydrocarbon in Polystyrene by Resonance Nuclear Reaction Analysis," J. Appl. Phys., 1992, 71, 681-684.
  48. N. De Kimpe, W. Coppens, A. Krauze, B. De Corte, C. Stevens and J. T. Welch, Bull. Soc. Chim. Belg. 1992, 101, 237-241.
  49. K. Umezawa, W. M. Gibson, J. T. Welch, P. Zhou, Q. Xu, and H. L. Frisch Appl. Phys. Lett. 1992, 61, 1603. "A Study of Diffusion of a Fluorinated Hydrocarbon in Ion Beam Irradiated Poly(styrene) by Nuclear Resonance Reaction Analysis."
  50. J. T. Welch, E. M. Keskeny, and P. J. Toscano, "A Novel Approach to the Preparation of Pentacarbonyl(dialkylaminofluorocarbene)chromium Compounds. Confirmation of Structure by Single Crystal X-Ray Diffraction." J. Organometallic Chem. 1993, 461, 95-97.
  51. L. Boros-Gregor, B. DeCorte, R. Gimi, J. T. Welch, Y. Wu, R. Handschumacher, "Synthesis of Fluoroolefin Peptide Isosteres-Potential Tools For Controlling Peptide Conformations." Tetrahedron Lett. 1994, 35, 6033-6036.
  52. A. Abouabdellah, J. T. Welch, "Optically Active Fluorinated b-Lactam Building Blocks: A Novel Fluorinated Retroamide Isostere." Tetrahedron Asymmetry 1994, 5, 1005-1013. (invited contribution)
  53. A. Abouabdellah, L. Boros, F. Gyenes and J. T. Welch, "New Applications of Fluorinated Building Blocks," J. of Fluorine Chemistry, 1995, 72, 255-259. (invited contribution)
  54. R. J. Speirs, J. T. Welch, and M. H. Cynamon, "In Vitro Mycobacterial Activity of n-Propyl Pyrazinoate Against Pyrazinamide Resistant Mycobacterium tuberculosis." Antimicrob. Agents Chemother. 1995, 39, 1269-1271.
  55. Cynamon, M. H. ; Gimi, R.; Sharpe, C. A.; Bergmann, K. E.; Gyenes, F.; and Welch, J. T. "Pyrazinoic Acid Esters with Broad Spectrum In vitro Antimycobacterial Activity, " J. Med. Chem.. 1995, 20, 3902-3907.
  56. Madarasz, Z.; Nemeth, I.; Toscano, P.; Welch, J.; Nyitrai, J. Stereocontrolled Synthesis of Methyl aR,2S,3R-3-(1-Acetoxyethyl)-1-(4-methoxyphenyl)-4-oxoazetidine-2-carboxylate. Tetrahedron Lett. 1995, 36, 8303-8306.
  57. J. T. Welch and J. Lin, Fluoroolefin Containing Dipeptide Isosteres as Inhibitors of Dipeptidyl Peptidase IV(CD26), Tetrahedron, 1996, 52, 291-304. (invited contribution)
  58. Bergmann, K. E.; Cynamon, M. H. and Welch, J. T. Quantitative Structure-Activity Relationships for the in vitro Antimycobacterial Activity of Pyrazinoic Acid Esters. J. Med. Chem. 1996, 39, 3394-3400.
  59. J. T. Welch, J. S. Plummer, and R. W. Herbert,Research on Chemical Intermediates 1996, 22, 791-798. "The Generation of the Diisopropyl Nitroxide Radical During the Reaction of Lithium Diisopropylamide with a-Fluoroacetate Esters." (Invited contribution)
  60. S. C. Ngo, J. T. Welch, J. Okuda, and P. J. Toscano, "Bistriflate Titanium Complexes for the Polymerization of Styrene," Polymer Preprints, 1996, 37, 330-331.
  61. R. J. Speirs, J. T. Welch and M. H. Cynamon, "InVitro Antimycobacterial Activity of 5-Chloropyrazinamide," Antimicrobial Agents and Chemotherapy, 1998, 42, 462-463.
  62. J. T. Welch and F. Gyenes, "Easy Access to Amines Employing the Barbier-type Reaction of Imines Derived from the Corresponding Aromatic and Aliphatic Aldehydes." J. Org. Chem., 1998, 63, 2824-2828.
  63. J. T. Welch and J. Lin, "Inhibition of Dipeptidyl Peptidase IV (DPP IV) by Fluoroolefin Containing N-Peptidyl-O-hydroxylamine Peptidomimetics." Proc. Nat. Acad. Sci., 1998, 95, 14020-14024.
  64. J. Lin, J. T. Welch, "tert-Butyl a-Fluoro-a-Trialkylsilyacetates, New Reagents for Peterson Fluoroolefination Reactions." Tetrahedron Lett., 1998, 39, 9613-9616.
  65. J. T. Welch, T. Gregor A. Kornilov, "Lewis Acid Mediated Peterson Fluoroolefination." Israel J. Chem. 1999, 39, 171-178.