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71. "The Effect of Electrostatic Interactions on Conformational Equilibria of Multiply-Substituted Tetrahydropyran Oxocarbenium Ions." M. T. Yang, K. A. Woerpel, submitted for publication. 70. "Nucleophilic Substitution Reactions of 2-Thiophenyl-Substituted Carbohydrate Acetals and Related Systems: Episulfonium Ions versus Oxocarbenium Ions as Reactive Intermediates." M. G. Beaver, S. B. Billings, K. A. Woerpel, Eur. J. Org. Chem. 2008, 771-781. DOI: 10.1002/ejoc.200700911 69. "C-Glycosylation Reactions of Sulfur-Substituted Glycosyl Donors: Evidence Against the Role of Neighboring-Group Participation." M. G. Beaver, S. B. Billings, K. A. Woerpel, J. Am. Chem. Soc. 2008, 130, 2082-2086. DOI: 10.1021/ja0767783 68. "Metal-Catalyzed Silylene Insertions of Allylic Ethers: Stereoselective Formation of Chiral Allylic Silanes." L. E. Bourque, P. A. Cleary, K. A. Woerpel, J. Am. Chem. Soc. 2007, 129, 12602-12603. DOI: 10.1021/ja073758s 67. "Synthesis of Tertiary α-Hydroxy Acids By Silylene Transfer to α-Keto Esters." B. E. Howard, K. A. Woerpel, Org. Lett. 2007, 9, 4651-4653. DOI: 10.1021/ol702148x 66. "Metal-Catalyzed Silylene Transfer to Imines: Synthesis and Reactivity of Silaaziridines." Z. Nevárez, K. A. Woerpel, Org. Lett. 2007, 9, 3773-3776. DOI: 10.1021/ol701424a 65. "Mechanistic Studies of the Allylic Rearrangements of ?-Silyloxy Allylic Silanes to Silyloxy Vinylic Silanes." A. I. Kim, K. L. Kimmel, A. Romero, J. H. Smitrovich, K. A. Woerpel, J. Org. Chem. 2007, 72, 6595-6598. DOI: 10.1021/jo070634p 64. “Kinetic Resolution of Hydroperoxides with Enantiopure Phosphines: Preparation of Enantioenriched Tertiary Hydroperoxides.” T. G. Driver, J. R. Harris, K. A. Woerpel, J. Am. Chem. Soc. 2007, 129, 3836-3837. DOI: 10.1021/ja070482f 63. “Formation of Chiral Quaternary Carbon Stereocenters Using Silylene Transfer Reactions: Enantioselective Synthesis of (+)-5-epi-Acetomycin.” S. A. Calad, K. A. Woerpel, Org. Lett. 2007, 9, 1037-1040. DOI: 10.1021/ol063072p 62. “Synthesis of (±)-epi-Stegobinone Utilizing Silacyclopropanes as Synthetic Intermediates.” S. A. Calad, J. Cirakovic, K. A. Woerpel, J. Org. Chem. 2007, 72, 1027-1030. DOI: 10.1021/jo0620011 61. “Synthesis of (–)-(S,S)-Bis(4-isopropyloxazoline) [(4S, 4S’)-2,2’-(Propane-2,2-diyl)bis(4-isopropyl-4,5-dihydrooxazole)].” D. A. Evans, K. A. Woerpel, B. Nosse, A. Schall, Y. Shinde, E. Jezek, M. M. Haque, R. B. Chhor, O. Reiser Org. Synth. 2006, 83, 97-102. 60. “Electrostatic Effects on the Reactions of Cyclohexanone Oxocarbenium Ions.” G. Baghdasarian, K. A. Woerpel, J. Org. Chem. 2006; 71, 6851-6858. DOI: 10.1021/jo060968z. 59. “The Formation and Reactivity of Silacyclopropenes Derived from Siloxyalkynes: Stereoselective Formation of 1,2,4-Triols.” T. B. Clark, K. A. Woerpel, Org. Lett. 2006, 8, 4109-4112. DOI: 10.1021/ol061652g 58. “Stereoselective Synthesis of Highly Substituted g-Lactams by the [3+2] Annulation of a-Siloxy Allylic Silanes with Chlorosulfonyl Isocyanate.” A. Romero, K. A. Woerpel, Org. Lett. 2006, 8, 2127-2130. DOI: 10.1021/ol060596g 57. “Nucleophilic Additions of Trimethylsilyl Cyanide to Cyclic Oxocarbenium Ions: Evidence for the Loss of Stereoselectivity at the Limits of Diffusion Control.” S. R. Shenoy, D. M. Smith, K. A. Woerpel, J. Am. Chem. Soc. 2006, 128, 8671-8677. DOI: 10.1021/ja061110u 56. “Nucleophilic Substitution Reactions of Sulfur-Substituted Cyclohexanone Acetals: An Analysis of the Factors Controlling Stereoselectivity.” S. B. Billings, K. A. Woerpel, J. Org. Chem.2006, 71, 5171-5178. DOI: 10.1021/jo060077r 55. “Electrostatic Interactions in Cations and their Importance in Biology and Chemistry.” D. M. Smith, K. A. Woerpel, Org. Biomol. Chem. 2006, 4, 1195-1201. DOI: 10.1039/b600056h 54. “Metal-catalyzed Rearrangement of Homoallylic Ethers to Silylmethyl Allylic Silanes in the Presence of a Di-t-butylsilylene Source.” P. A. Cleary, K. A. Woerpel, Org. Lett. 2005, 7, 5531-5533. DOI: 10.1021/ol052456x 53. "Silver-Catalyzed Silacyclopropanation of 1-Heteroatom-Substituted Alkynes and Subsequent Rearrangement Reactions." T. B. Clark, K. A. Woerpel, Organometallics 2005, 24, 6212-6219. DOI: 10.1021/om050501z 52. "Metal-Catalyzed Rearrangement of Homoallylic Ethers to Silylmethyl Allylic Silanes in the Prescence of a Di-tert-butylsilylene Source." P. A. Cleary, K. A. Woerpel, Org. Lett. 2005, 7, 5531-5533. DOI: 10.1021/ol052456x 51. "Synthesis of 1,2-Dioxolanes by Annulation Reactions of Peroxzcarbenium Ions with Alkenes." A. Ramirez, K. A. Woerpel, Org. Lett. 2005, 7, 4617-4620. DOI: 10.1021/ol051703u 50. "Stereoselective C-Glycosylation Reactions of Ribose Derivatives: Electronic Effects of Five-Membered Ring Oxocarbenium Ions." C. H. Larsen, B. H. Ridgway, J. T. Shaw, D. M. Smith, K. A. Woerpel, J. Am. Chem. Soc. 2005, 127, 10879-10884. DOI: 10.1021/ja0524043 49. "Structural Evidence that Alkoxy Substituents Adopt Electronically Preferred Pseudoaxial Orientations in Six-Membered Ring Dioxocarbenium Ions." S. Chamberland, J. W. Ziller, K. A. Woerpel, J. Am. Chem. Soc. 2005, 127, 5322-5323. DOI: 10.1021/ja050830i 48. "Investigations into the Role of Ion Pairing in the Reactions of Heteroatom-Substituted Cyclic Oxocarbenium Ions." S. Shenoy, K. A. Woerpel, Org. Lett., 2005, 7, 1157-1160. DOI: 10.1021/ol0500620 47. "Silylene Transfer to Carbonyl Compounds and Subsequent Ireland–Claisen Rearrangements to Control Formation of Quaternary Carbon Stereocenters." S. A. Calad, K. A. Woerpel, J. Am. Chem. Soc. 2005, 127, 2046-2047. DOI: 10.1021/ja042893r 46. "Using Nucleophilic Substitution Reactions to Understand How a Remote Alkyl or Alkoxy Substituent Influences the Conformation of Eight Membered-Ring Oxocarbenium Ions." S. Chamberland, K. A. Woerpel, Org. Lett. 2004, 6, 4739-4741. DOI: 10.1021/ol047998d 45. "Formation and Utility of Oxasilacyclopentenes Derived from Functionalized Alkynes." T. B. Clark, K. A. Woerpel, J. Am. Chem. Soc. 2004, 126, 9522-9523. DOI: 10.1021/ja047498f 44. "Using Stereoelectronic Effects to Explain Selective Reactions of 4-Substituted Five-Membered Ring Oxocarbenium Ions." D. M. Smith, K. A. Woerpel, Org. Lett. 2004, 6, 2063-2066. DOI: 10.1021/ol0492647 43. "Mechanism of Silver-Mediated Di-tert-Butylsilylene Transfer from a Silacyclopropane to an Alkene." T. G. Driver, K. A. Woerpel, 2004, 126, 9993-10002. DOI: 10.1021/ja0306563 42. "Metal-Catalyzed Di-tert-Butylsilylene Transfer: Synthesis and Reactivity of Silacyclopropanes," J. Cirakovic, T. G. Driver, K. A. Woerpel, J. Org. Chem. 2004, 69, 4007-4012 (this paper was the Cover Article for Issue 12, June 11, 2004). 41. "The Use of an Aminosilyllithium for the Diastereoselective Synthesis of Diphenyl Oxasilacyclopentane Acetals and Polyols." J. M. Tenenbaum, K. A. Woerpel, Org. Lett. 2003, 5, 4325-4327. DOI: 10.1021/ol035577a 40. "Stereochemistry of Nucleophilic Substitution Reactions Depending Upon Substituent: Evidence for Electrostatic Stabilization of Pseudoaxial Conformers of Oxocarbenium Ions by Heteroatom Substituents." L. Ayala, C. G. Lucero, J. A. C. Romero, S. A. Tabacco, K. A. Woerpel, J. Am. Chem. Soc. 2003, 125, 15521-15528. DOI: 10.1021/ja037935a 39. "Nucleophilic Additions to Fused Bicyclic Five-Membered Ring Oxocarbenium Ions: Evidence for Preferential Attack on the Inside Face." D. M. Smith, M. B. Tran, K. A. Woerpel, J. Am. Chem. Soc. 2003, 125, 14149-14152. DOI: 10.1021/ja0375176 38. "The [3 + 2] Annulation of Allylic Silanes in Acyclic Stereocontrol: Total Synthesis of (9S)-Dihydroerythronolide A." Z.-H. Peng, K. A. Woerpel, J. Am. Chem. Soc. 2003, 125, 6018-6019. DOI: 10.1021/ja034865z 37. "Mechanism of di-tert-Butylsilylene Transfer from a Silacyclopropane to an Alkene." T. G. Driver, K. A. Woerpel, J. Am. Chem. Soc. 2003, 125, 10659-10663. DOI: 10.1021/ja0301370 36. "Reactions of Silylmethyl Allylic Silanes: Synthesis of Tetrahydrofurans." J. H. Smitrovich, K. A. Woerpel, Synthesis, 2002, 2778-2785. (pdf) 35. "Utilization of 1-Oxa-2,2-(dimesityl)silacyclopentane Acetals in the Stereoselective Synthesis of Polyols." S. A. Blair, J. M. Tenenbaum, K. A. Woerpel, J. Am. Chem. Soc., 2002, 124, 12648-12649. DOI: 10.1021/ja027335w 34. "Synthesis of (±)-epi-Citreoviral and (±)-Citreoviral and the Kinetic Resolution of an Allylic Silane by a [3 + 2] Annulation." Z.-H. Peng, K. A. Woerpel, Org. Lett. 2002, 4, 2945-2948. 33. "Low Temperature Silacyclopropanation of Mono- and Disubstituted Alkenes." J. Cirakovic, T. G. Driver, K. A. Woerpel, J. Am. Chem. Soc. 2002, 124, 9370-9371. 32. "Diastereoselective Silacyclopropanations of Functionalized Chiral Alkenes." T. G. Driver, A. K. Franz, K. A. Woerpel, J. Am. Chem. Soc. 2002, 124, 6524-6525. 31. "Development of the [3 + 2] Annulations of Cyclohexenyl Silanes with Chlorosulfonyl Isocyanate: Application to the Total Synthesis of (±)-Peduncularine." C. W. Roberson, K. A. Woerpel, J. Am. Chem. Soc. 2002, 124, 11342-11348. DOI: 10.1021/ja012152f 30. "Diastereoselective Nucleophilic Substitution Reactions of Oxasilacyclopentane Acetals: Application of the 'Inside Attack' Model for Reactions of Five-membered Ring Oxocarbenium Ions." T. J. Bear, J. T. Shaw, K. A. Woerpel, J. Org. Chem. 2002, 67, 2056-2064. 29. "Stereoselective Synthesis of Substituted g-Butyrolactones by the [3 + 2] Annulation of Allylic Silanes with Chlorosulfonyl Isocyanate: Enantioselective Total Synthesis of (+)-Blastmycinone." Z.-H. Peng, K. A. Woerpel, Org. Lett. 2001, 3, 675-678. 28. "Palladium-Catalyzed Reactions of Di-tert-butylsiliranes with Electron-Deficient Alkynes and Investigations of the Catalytic Cycle." W. S. Palmer, K. A. Woerpel, Organometallics, 2001, 20, 3691-3697. DOI: 10.1021/om000870p 27. "ZnBr2-Catalyzed Insertions of Carbonyl Compounds into Silacyclopropanes: Regiochemical Reversal Dependent on Metal Salt." A. K. Franz, K. A. Woerpel, Angew. Chem. Int. Ed. 2000, 39, 4295-4299. DOI: 10.1002/1521-3773(20001201) 26. "Benzhydryldimethylsilyl Allylic Silanes: Syntheses and Applications to [3 + 2] Annulation Reactions." Z.-H. Peng, K. A. Woerpel, Org. Lett. 2000, 2, 1379-1381. 25. "Formal Synthesis of (±)-Peduncularine: Use of the [3 + 2] Annulation of Allylic Silanes and Chlorosulfonyl Isocyanate." C. W. Roberson, K. A. Woerpel, Org. Lett. 2000, 2, 621-623. DOI: 10.1021/ol9913744 24. "Development of Reactions of Silacyclopropanes as New Methods for Stereoselective Organic Synthesis." A. K. Franz, K. A. Woerpel, Acc. Chem. Res. 2000, 33, 813-820. 23. "Stereochemical Reversal of Nucleophilic Substitution Reactions Depending Upon Substituent: Reactions of Heteroatom-Substituted Six-Membered Ring Oxocarbenium Ions Through Pseudo-Axial Conformers." J. A. C. Romero, S. A. Tabacco, K. A. Woerpel, J. Am. Chem. Soc. 2000, 122, 168-169. DOI: 10.1021/ja993366o. 22. "A Stereoelectronic Model to Explain the Highly Stereoselective Reactions of Nucleophiles with Five-membered Ring Oxocarbenium Ions." C. H. Larsen, B. H. Ridgway, J. T. Shaw, K. A. Woerpel, J. Am. Chem. Soc. 1999, 121, 12208-12209. DOI: 10.1021/ja993349z 21. "Stereoselective Synthesis of (Z)- and (E)-Allylic Silanes by Copper-Mediated Substitution Reactions of Allylic Carbamates with Grignard Reagents." J. H. Smitrovich, K. A. Woerpel, J. Org. Chem. 2000, 65, 1601-1614. DOI: 10.1021/jo991312r 20. "Divergent Diastereoselectivity in the Addition of Nucleophiles to Furan-Derived Oxonium Ions." J. T. Shaw, K. A. Woerpel, Tetrahedron 1999, 55, 8747-8756. DOI:10.1016/S0040-4020(99)00441-X 19. "Stereospecific and Regioselective Isocyanide Insertions into Silacyclopropanes to Form Iminosilacyclobutanes and Subsequent Ring-Expansion Reactions." P. T. Nguyen, W. S. Palmer, K. A. Woerpel, J. Org. Chem. 1999, 64, 1843-1848. DOI: 10.1021/jo9816257 18. "The [3 + 2] Annulation of Allylsilanes and Chlorosulfonyl Isocyanate: Stereoselective Synthesis of 2-Pyrrolidinones." C. W. Roberson, K. A. Woerpel, J. Org. Chem. 1999, 64, 1434-1435. DOI: 10.1021/jo982375x 17. "Stereospecific and Regioselective Reactions of Silacyclopropanes with Carbonyl Compounds Catalyzed by Copper Salts: Evidence for a Transmetalation Mechanism." A. K. Franz, K. A. Woerpel, J. Am. Chem. Soc. 1999, 121, 949-957. DOI: 10.1021/ja982897u 16. "Copper-Mediated Substitution Reactions of Alkylmagnesium Reagents with Allylic Carbamates: (Z)-Selective Alkene Synthesis." J. H. Smitrovich, K. A. Woerpel, J. Am. Chem. Soc. 1998, 120, 12998-12999. DOI: 10.1021/ja9820341 15. "An Improved Procedure for the Preparation of 2,2-Bis[2-[4(S)-tert-butyl-1,3-oxazolinyl]]propane [(S,S)-tert-Butylbis(oxazoline)] and Derived Copper(II) Complexes." D. A. Evans, G. S. Peterson, J. S. Johnson, D. M. Barnes, K. R. Campos, K. A. Woerpel, J. Org. Chem. 1998, 63, 4541-4544. DOI: 10.1021/jo980296f 14. "Transmetalation of Alkylboranes to Palladium in the Suzuki Coupling Reaction Proceeds with Retention of Stereochemistry." B. H. Ridgway, K. A. Woerpel, J. Org. Chem. 1998, 63, 458-460. DOI: 10.1021/jo970803d 13. "Preparation and Synthetic Utility of Oxasilacyclopentane Acetals Derived from Siliranes." J. T. Shaw, K. A. Woerpel, Tetrahedron 1997, 53, 16597-16606. 12. "Synthesis of Silirenes by Palladium-Catalyzed Transfer of Silylene from Siliranes to Alkynes." W. S. Palmer, K. A. Woerpel, Organometallics 1997, 16, 4824-4827. 11. "Divergent Diastereoselectivity in the Addition of Nucleophiles to Five-Membered-Ring Oxonium Ions." J. T. Shaw, K. A. Woerpel, J. Org. Chem. 1997, 62, 6706-6707. 10. "Tandem Aldol-Tishchenko Reactions of Lithium Enolates: A Highly Stereoselective Method for Diol and Triol Synthesis." P. M. Bodnar, J. T. Shaw, K. A. Woerpel, J. Org. Chem. 1997, 62, 5674-5675. DOI: 10.1021/jo971012e 9. "Stereo- and Regioselectivity of Reactions of Siliranes with Aldehydes and Related Substrates." P. M. Bodnar, W. S. Palmer, B. H. Ridgway, J. T. Shaw, J. H. Smitrovich, K. A. Woerpel, J. Org. Chem. 1997, 62, 4737-4745. DOI: 10.1021/jo970263k 8. "Stereospecific Palladium-Catalyzed Reactions of Siliranes with Alkynes." W. S. Palmer, K. A. Woerpel, Organometallics 1997, 16, 1097-1099. DOI: 10.1021/om960923w 7. "Stereoselective Insertion of Formamides into the C-Si Bond of Siliranes." J. T. Shaw, K. A. Woerpel, J. Org. Chem. 1997, 62, 442-443. DOI: 10.1021/jo962186j 6. "Oxidation of Sterically Hindered Alkoxysilanes and Phenylsilanes Under Basic Conditions." J. H. Smitrovich, K. A. Woerpel, J. Org. Chem. 1996, 61, 6044-6046. 5. "Stereo- and Regiochemistry of Aldehyde Insertions into the C–Si Bonds of Siliranes." P. M. Bodnar, W. S. Palmer, J. T. Shaw, J. H. Smitrovich, J. D. Sonnenberg, A. L. Presley, K. A. Woerpel, J. Am. Chem. Soc. 1995, 117, 10575-10576. 4. "Silica as a Ligand: Reactivity of the Iridium-Oxygen Bond of Cp*Ir[silica](Ph)(PMe3)." T. Y. Meyer, K. A. Woerpel, B. M. Novak, R. G. Bergman, J. Am. Chem. Soc. 1994, 116, 10290-10291. 3. "Synthesis and Reactivity of an Iridium Hydroxo Complex. Insertion of Ethylene Into a Metal-Oxygen Bond." K. A. Woerpel, R. G. Bergman, J. Am. Chem. Soc. 1993, 115, 7888-7889. 2. "Bis(oxazolines) as Ligands for Self-Assembling Chiral Coordination Polymers– Structure of a Copper(I) Catalyst for the Enantioselective Cyclopropanation of Olefins." D. A. Evans, K. A. Woerpel, M. J. Scott, Angew. Chem. Int. Ed. Engl. 1992, 31, 430-432. |
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Updated 6.30.08 |
