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Department of Chemistry

Selected Publications

  1. Zhu, S.-F.; Perman, J. A.; Zhang, X. P. "Acceptor/Acceptor-Substituted Diazo Reagents for Carbene Transfers: Cobalt-Catalyzed Asymmetric (Z)-Cyclopropanation of Alkenes with α-Nitro-Diazoacetates" Angew. Chem. Int. Ed., 2008, ODI: 10.1002/anie.200803857. [abstract]
  2. Jones, J. E.; Ruppel, J. V.; Gao, G.-Y.; Thomas, M. M.; Zhang, X. P. "Cobalt-Catalyzed Asymmetric Olefin Aziridination with Diphenylphosphoryl Azide" J. Org. Chem., 2008, 73, 7260–7265. [abstract]
  3. Gao, G.-Y.; Ruppel, J. V.; Fields, K. B.; Xu, X.; Chen, Y.; Zhang, X. P. "Synthesis of Diporphyrins via Palladium-Catalyzed C–O Bond Formation: Effective Access to Chiral Diporphyrins" J. Org. Chem., 2008, 73, 4855-4858. [abstract]
  4. Ruppel, J. V.; Jones, J. E.; Huff, C. A.; Kamble, R. M.; Chen, Y.; Zhang, X. P. "A Highly Effective Cobalt Catalyst for Olefin Aziridination with Azides: Hydrogen Bonding-Guided Catalyst Design" Org. Lett., 2008, 10, 1995-1998. [abstract]
  5. Zhu, S.; Ruppel, J. V.; Lu, H., Wojtas, L.; Zhang, X. P. "Cobalt-Catalyzed Asymmetric Cyclopropanation with Diazosulfones: Rigidification and Polarization of Ligand Chiral Environment via Hydrogen Bonding and Cyclization" J. Am. Chem. Soc., 2008, 130, 5042–5043. [abstract]
  6. Gao, G. Y.; Ruppel, J. V.; Allen, D. B.; Chen, Y.; Zhang, X. P. "Synthesis of beta-Functionalized Porphyrins via Palladium-Catalyzed Carbon–Heteroatom Bond Formations: Expedient Entry into beta-Chiral Porphyrins" J. Org. Chem., 2007, 72, 9060–9066. [abstract]
  7. Harden, J. D.; Ruppel, J. V.; Gao, G.-Y.; Zhang, X. P. “Cobalt-Catalyzed Intermolecular C–H Amination with Bromamine-T as Nitrene Source” Chem. Comm., 2007, 4644–4646. [abstract]
  8. Ruppel, J. V.; Kamble, R. M.; Zhang, X. P. "Cobalt-Catalyzed Intramolecular C–H Amination with Arylsulfonyl Azides" Org. Lett., 2007, 9, 4889–4892. [abstract]
  9. Chen, Y.; Ruppel, J. V.; Zhang, X. P. "Cobalt-Catalyzed Asymmetric Cyclopropanation of Electron-Deficient Olefins" J. Am. Chem. Soc., 2007, 129, 12074–12075. [abstract]
  10. Chen, Y.; Zhang, X. P. "Asymmetric Cyclopropanation of Styrenes Catalyzed by Metal Complexes of D2-Symmetrical Chiral Porphyrin: Superiority of Cobalt over Iron" J. Org. Chem., 2007, 72, 5931–5934. [abstract]
  11. Gao, G.-Y.; Jones, J. E.; Vyas, R.; Harden, J. D.; Zhang, X. P. "Cobalt-Catalyzed Aziridination with Diphenylphosphoryl Azide (DPPA): Direct Synthesis of N-Phosphorous-Substituted Aziridines from Alkenes" J. Org. Chem., 2006, 71, 6655–6658. [abstract]
  12. Chen, Y.; Zhang, X. P. "Trans Effect on Cobalt Porphyrin Catalyzed Asymmetric Cyclopropanation" Synthesis, 2006, 10, 1697–1700. (Invited Contribution to Special Topic) [abstract]
  13. Gao, G.-Y.; Harden, J. D.; Zhang, X. P. "Cobalt-Catalyzed General and Efficient Aziridination of Alkenes" Org. Lett., 2005, 7, 3191–3193. [abstract]
  14. Chen, Y.; Gao, G.-Y.; Zhang, X. P. "Palladium-Mediated Synthesis of Novel meso-Chiral Porphyrins for Cobalt-Catalyzed Cyclopropanation" Tetrahedron Lett., 2005, 46, 4965–4969. [abstract]
  15. Baskaran, D.; Mays, J. W.; Zhang, X. P.; Bratcher, M. S. "Carbon Nanotubes with Covalently Linked Porphyrin Antennae: Photoinduced Electron Transfer" J. Am. Chem. Soc., 2005, 127, 6916–6917. [abstract]
  16. Gao, G.-Y.; Colvin, A. J.; Chen, Y.; Zhang, X. P. "Synthesis of meso-Arylsulfanyl- and Alkylsulfanyl-Substituted Porphyrins via Palladium-Mediated C–S Bond Formation" J. Org. Chem., 2004, 69, 8886–8892. [abstract]
  17. Chen, Y.; Fields, K. B.; Zhang, X. P. "Bromoporphyrins as Versatile Synthons for Modular Construction of Chiral Porphyrins: Cobalt-Catalyzed Highly Enantioselective and Diastereoselective Cyclopropanation" J. Am. Chem. Soc., 2004, 126, 14718–14719. [abstract]
  18. Vyas, R.; Gao, G.-Y.; Harden, J. D.; Zhang, X. P. "Iron(III) Porphyrin-Catalyzed Aziridination of Alkenes with Bromamine-T as Nitrene Source" Org. Lett., 2004, 6, 1907–1910. [abstract]
  19. Gao, G.-Y.; Chen, Y.; Zhang, X. P. "General Synthesis of meso-Amidoporphyrins via Palladium-Catalyzed Amidation" Org. Lett., 2004, 6, 1837–1840. [abstract]
  20. Chen, Y.; Zhang, X. P. “Vitamin B12 Derivatives as Natural Asymmetric Catalysts: Enantioselective Cyclopropanation of Alkenes” J. Org. Chem., 2004, 69, 2431–2435. [abstract]
  21. Lee, M.-Y.; Chen, Y.; Zhang, X. P. “General and Selective Olefination of Aldehydes and Ketones Catalyzed by a Cobalt(II) Porphyrin Complex” Organometallics, 2003, 22, 4905–4909. [abstract]
  22. Huang, L.; Chen, Y.; Gao, G.-Y.; Zhang, X. P. “Diastereoselective and Enantioselective Cyclopropanation of Alkenes Catalyzed by Cobalt Porphyrins” J. Org. Chem., 2003, 68, 8179–8184. [abstract]
  23. Gao, G.-Y.; Colvin, A. J.; Chen, Y.; Zhang, X. P. “Versatile Synthesis of meso-Aryloxy- and Alkoxy-Substituted Porphyrins via Palladium-Catalyzed C–O Cross-Coupling Reactions” Org. Lett., 2003, 5, 3261–3264. [abstract]
  24. Gao, G.-Y.; Chen, Y.; Zhang, X. P. “General and Efficient Synthesis of Arylamino- and Alkylamino-Substituted Diphenylporphyrins and Tetraphenylporphyrins via Palladium-Catalyzed Multiple Amination Reactions” J. Org. Chem., 2003, 68, 6215–6221. [abstract]
  25. Chen, Y.; Huang, L.; Zhang, X. P. “Acid-Promoted Olefination of Ketones by Iron(III) Porphyrin Complex” Org. Lett., 2003, 5, 2493–2496. [abstract]
  26. Chen, Y.; Huang, L.; Zhang, X. P. “Efficient and Stereoselective Synthesis of beta-Trifluoromethyl-alpha, beta-Unsaturated Esters via Iron(III) Porphyrin-Catalyzed Olefination of Ketones” J. Org. Chem., 2003, 68, 5925–5929. [abstract]
  27. Chen, Y.; Zhang, X. P. “Facile and Efficient Synthesis of meso-Arylamino- and Alkylamino-Substituted Porphyrins via Palladium-Catalyzed Amination” J. Org. Chem., 2003, 68, 4432–4438. [abstract]
  28. Chen, Y.; Huang, L.; Ranade, M. A.; Zhang, X. P. “Iron(III) and Ruthenium(II) Porphyrin Complexes-Catalyzed Selective Olefination of Aldehydes with Ethyl Diazoacetate” J. Org. Chem., 2003, 68, 3714–3717. [abstract]