Nakamura Group

59. Palladium- and Platinum-Catalyzed Reaction of Siloxycyclopropanes with Acid Chlorides. A Homoenolate Route to 1,4-Dicarbonyl Compounds, S. Aoki, T. Fujimura, E. Nakamura, and I. Kuwajima Tetrahedron Lett., 30, 6541-6544 (1989).

58. Applications of Metalated Cyclopropenone Ketals in a General Synthesis of Cyclopropenones. An Efficient Synthesis of the Antibiotic Penitricin, M. Isaka, S. Matsuzawa, S. Yamago, S. Ejiri, Y. Miyachi, and E. Nakamura, J. Org. Chem., 54, 4727-4729 (1989).

57. Total Synthesis of (±)-Cortisone. Double Hydroxylation Reaction for Corticoid Synthesis, Y. Horiguchi, E. Nakamura, and I. Kuwajima, J. Am. Chem. Soc., 111, 6257-6265 (1989).

56. Use of Methylenecyclopropanone Ketals for Cyclopentane Synthesis. A New Efficient Thermal [3 + 2] Cycloaddition, S. Yamago and E. Nakamura, J. Am. Chem. Soc., 111, 7285-7286 (1989).

55. Homogeneous Sonochemistry in Radical Chain Reactions. Sonochemical Hydrostannation and Tin Hydride Reduction, E. Nakamura, D. Machii, and T. Inubushi, J. Am. Chem. Soc., 111, 6849-6850 (1989).

54. Double Hydroxylation of Enol Silyl Ethers. A Single-Step Synthesis of αα’-Dihydroxy Ketone, Y. Horiguchi, E. Nakamura, and I. Kuwajima, Tetrahedron Lett., 30, 3323-3326 (1989).

53. Me₃SiCl-Assisted 1,2-Addition of Organocuprates to Carbonyl Compounds, S. Matsuzawa, M. Isaka, E. Nakamura, and I. Kuwajima, Tetrahedron Lett., 30, 1975-1978 (1989).

52. Virtually Complete Diastereofacial Selectivity in the S_N2′ Allylation of Organocopper Reagents, E. Nakamura, K. Sekiya, M. Arai, and S. Aoki, J. Am. Chem. Soc., 111, 3091-3093 (1989).

51. Synthesis of Propellanes by “Exocyclic” Transannular Cycloaddition of Olefinic Methylenecyclopropanes, S. Yamago and E. Nakamura, Tetrahedron, Symposium in Print, 45, 3081-3088 (1989).

50. Chlorosilane-Accelerated Conjugate Addition of Catalytic and Stoichiometric Organocopper Reagents, S. Matsuzawa, Y. Horiguchi, E. Nakamura, and I. Kuwajima, Tetrahedron, Symposium in Print, 45, 349-362 (1989).

49. Synthesis of [3.3.3] Propellanes by “Exocyclic” Transannular Cyclization of Olefinic Methylenecyclopropane, S. Yamago and E. Nakamura, J. Chem. Soc., Chem. Commun., 1112-1113 (1988).

48. Copper- and Nickel-Catalysis in S_N2′ and S_N2-Regioselective Allylation of Organozinc Reagents, K. Sekiya and E. Nakamura, Tetrahedron Lett., 40, 5155-5156 (1988).

47. Palladium Catalyzed Arylation of Siloxycyclopropanes with Aryl Triflates. Carbon Chain Elongation via Catalytic Carbon-Carbon Bond Cleavage, S. Aoki, T. Fujimura, E. Nakamura, and I. Kuwajima, J. Am. Chem. Soc., 110, 3296-3298 (1988).

46. Stereochemistry of the Fluoride Catalyzed Aldol Reaction of Enol Silyl Ethers. Evidence for Another Non-Chelate Transition State, E. Nakamura, S. Yamago, D. Machii, and I. Kuwajima, Tetrahedron Lett., 29, 2207-2210 (1988).

45. Synthesis of 4-Keto Pimelates by Palladium-Catalyzed Carbonylative Symmetrical Coupling of Siloxycyclopropanes, S. Aoki, E. Nakamura, and I. Kuwajima, Tetrahedron Lett., 29, 1542-1543 (1988).

44. Carbocupration of Cyclopropene. A Novel Synthon of Cyclopropanone Enolate and its Application to [3+2] and [3+2+2] Annulation, E. Nakamura, M. Isaka, and S. Matsuzawa, J. Am. Chem. Soc., 110, 1297-1298 (1988).

43. Carbon-Carbon Bond Forming Reactions of Zinc Homoenolate of Esters. A Novel Three-Carbon Nucleophile with General Synthetic Utility, E. Nakamura, S. Aoki, K. Sekiya, H. Oshino, and I. Kuwajima, J. Am. Chem. Soc., 109, 8056-8066 (1987).

42. Copper Catalyzed Conjugate Addition of a Zinc Homoenolate: Ethyl 3-[3-(Trimethylsilyloxy)cyclohex-2-enyl)]propionate, E. Nakamura and I. Kuwajima, Org. Synth., 66, 43-51 (1988).

41. Ring Expansion and Cleavage of Succinoin Derivatives: Spiro[4.5]decane-1,4-dione and Ethyl 4-Cyclohexyl-4-oxobutanoate, E. Nakamura and I. Kuwajima, Org. Synth., 65, 17-25 (1987).

40. Chiral Zinc Homoenolate of Methyl Isobutyrate. A New Building Block for the Synthesis of Chiral α-Methylesters, E. Nakamura, K. Sekiya, and I. Kuwajima, Tetrahedron Lett., 28, 337-338 (1987).

39. Total Synthesis of (±)-Cortisone. Double Hydroxylation Reaction for the Construction of Corticoid Side Chain, Y. Horiguchi, E. Nakamura, and I. Kuwajima, J. Org. Chem., 51, 4323-4325 (1986).

38. Me₃SiCl Accelerated Conjugate Addition of Stoichiometric Organocopper Reagents E. Nakamura, S. Matsuzawa, Y. Horiguchi, and I. Kuwajima, Tetrahedron Lett., 27, 4029-4032 (1986).

37. Me₃SiCl/HMPA Accelerated Conjugate Addition of Catalytic Copper Reagent. Stereoselective Synthesis of Enol Silyl Ether of Aldehyde, Y. Horiguchi, S. Matsuzawa, E. Nakamura, and I. Kuwajima, Tetrahedron Lett., 27, 4025-4028 (1986).

36. Trichlorotitanium and Alkoxytitanium Homoenolates. Preparation, Characterization, and Utilization for Organic Synthesis, E. Nakamura, H. Oshino, and I. Kuwajima, J. Am. Chem. Soc., 108, 3745-3755 (1986).

35. Palladium Catalyzed Reactions of Propionate Homoenolate. Arylation, Vinylation, and Acylation, E. Nakamura and I. Kuwajima, Tetrahedron Lett. 27, 83-86 (1986).

34. Catalytic “Homo-Reformatsky” Reaction. Ambident Chemical Reactivities of the Zinc Homoenolate of Propionate, H. Oshino, E. Nakamura, and I. Kuwajima J. Org. Chem., 50, 2802-2804 (1985).

33. Stereocontrolled Construction of Oxygenated Steroidal Side Chains. Synthesis and Stereochemistry of Depresosterol, E. Nakamura and I. Kuwajima, J. Am. Chem. Soc., 107, 2138-2141 (1985).

32. A Ring Opening Reaction of 1-Siloxy-1-alkoxycyclopropanes. Preparation of Main Group Metal Homoenolates of Alkyl Propionate, E. Nakamura, J. Shimada, and I. Kuwajima, Organometallics, 4, 641-646 (1985).

31. Stereoselective Synthesis of trans-Hydrindanes by Internal Vinylsilane Acylation, K. Fukuzaki, E. Nakamura, and I. Kuwajima, Tetrahedron Lett., 25, 3591-3394 (1984).

30. Copper Catalyzed Acylation and Conjugate Addition of Zinc Homoenolate. Synthesis of 4- and 6-Oxo Esters, E. Nakamura and I. Kuwajima, J. Am. Chem. Soc., 106, 3368-3370 (1984).

29. Ring Expansion and Cleavage of Succinoin Derivatives. Geminal Acylation, Reductive Succinoylation, and Stereoselective Spiroannelation Methods, J. Shimada, K. Hashimoto, B. H. Kim, E. Nakamura, and I. Kuwajima, J. Am. Chem. Soc., 106, 1759-1773 (1984).

28. A Simplified Total Synthesis of Cytochalasins via Macrocyclic Diels-Alder Reaction, G. Stork and E. Nakamura, J. Am. Chem. Soc., 105, 5510-5511 (1983).

27. Remarkable Equatorial Selectivity in the Aldol Coupling between Enol Silyl Ethers and Cyclohexanone Ketals, E. Nakamura, Y. Horiguchi, J. Shimada, and I. Kuwajima, J. Chem. Soc., Chem. Commun., 796-797 (1983).

26. Erythro Selective Aldol Reactions of α-Trichlorostannyl Ketones, E. Nakamura and I. Kuwajima, Tetrahedron Lett., 24, 3347-3351 (1983).

25. Aldol Reaction of Trichlorotitanium Enolates. Revaluation of the Boat Transition State, E. Nakamura and I. Kuwajima, Tetrahedron Lett., 24, 3343-3346 (1983).

24. Formation and Characterization of Trichlorotitanium Enolates, E. Nakamura, J. Shimada, Y. Horiguchi, and I. Kuwajima, Tetrahedron Lett., 24, 3341-3342 (1983).

23. Ring Expansion of Succinoin Derivatives. New Synthetic Routes to Cyclopentenones, E. Nakamura, J. Shimada, and I. Kuwajima, J. Chem. Soc., Chem. Commun., 499-500 (1983).

22. Cyclopentenones by Internal Acylation of Vinylsilanes. Rapid Construction of Trichothecane-Type Carbon Frameworks, E. Nakamura, K. Fukuzaki, and I. Kuwajima, J. Chem. Soc., Chem. Commun., 498-499 (1983).

21. Fluoride Ion Catalyzed Aldol Reaction between Enol Silyl Ethers and Carbonyl Compounds, E. Nakamura, M. Shimizu, I. Kuwajima, J. Sakata, K. Yokoyama, and R. Noyori, J. Org. Chem., 48, 932-945 (1983).

20. Isolation and Reactions of Titanium Homoenolates of Esters, E. Nakamura and I. Kuwajima, J. Am. Chem. Soc., 105, 651-652 (1983).

19. Formation of α-Trichlorostannyl Ketones in the Reaction of Stannic Chloride with Enol Silyl Ethers, E. Nakamura and I. Kuwajima, Chem. Lett., 59-62 (1983).

18. Fluoride Catalyzed Reactions of Silylacetylenes with Carbonyl Compounds, I. Kuwajima, E. Nakamura, and K. Hashimoto, Tetrahedron, 39, 975-982 (1983).

17. Silylation of Ketones with Trimethylsilylacetate: (Z)-3-Trimethylsiloxy-2-pentene, I. Kuwajima, E. Nakamura, and K. Hashimoto, Org. Synth., 61, 122-129 (1983).

16. Fluoride-Mediated Reactions of Enol Silyl Ethers. Regiospecific Monoalkylation of Ketones, I. Kuwajima, E. Nakamura, and M. Shimizu, J. Am. Chem. Soc., 104, 1025-1030 (1982).

15. New Acyl Anion Equivalent. A Short Route to the Enol Lactam Intermediate in Cytochalasin Synthesis, E. Nakamura, Tetrahedron Lett., 22, 663-666 (1981).

14. Silylation of Relatively Acidic Compounds with Alkyl Trimethylsilylacetates, E. Nakamura, K. Hashimoto, and I. Kuwajima, Bull. Chem. Soc. Jpn., 54, 805-808 (1981).

13. Large-Ring Lactones by Internal Ketophosphonate Cyclization, G. Stork and E. Nakamura, J. Org. Chem., 44, 4010-4011 (1979).

12. A Facile Method for the Preparation of 5-Alkoxy-1,4-Diketones, I. Kuwajima, I. Azegami, and E. Nakamura, Chem. Lett., 1431-1432 (1978).

11. Highly Stereoselective Formation of Enol Silyl Ethers, E. Nakamura, K. Hashimoto, and I. Kuwajima, Tetrahedron Lett., 2079-2082 (1978).

10. Homoenolate Anion Precursor. Reaction of Ester Homoenol Silyl Ether with Carbonyl Compounds, E. Nakamura and I. Kuwajima, J. Am. Chem. Soc., 99, 7360-7361 (1977).

9. A Novel Ring-Opening Reaction. An Improved Method for Reductive Succinoylation, E. Nakamura, K. Hashimoto, and I. Kuwajima, J. Org. Chem., 42, 4166-4167 (1977).

8. Fluoride Ion Catalyzed Aldol Reaction between Enol Silyl Ethers and Carbonyl Compounds, R. Noyori, K. Yokoyama, J. Sakata, I. Kuwajima, E. Nakamura, and M. Shimizu, J. Am. Chem. Soc., 99, 1265-1267 (1977).

7. Geminal Acylation via Pinacol Rearrangement. Synthesis of Spiro[4.n] Ring Systems, E. Nakamura and I. Kuwajima, J. Am. Chem. Soc., 99, 961-963 (1977).

6. Generation of the Trans Enolate of Chloroacetaldehyde via β-Oxido Carbenoid, I. Kuwajima and E. Nakamura, J. Org. Chem., 42, 346-347 (1977).

5. Fluoride Catalyzed Addition of Silylacetylenes to Carbonyl Compounds, E. Nakamura, and I. Kuwajima, Angew. Chem. Int. Ed. Engl., 15, 498-498 (1976).

4. Quaternary Ammonium Fluoride-Catalyzed Conjugate Addition of Thiols to C=C Double Bonds, I. Kuwajima, T. Murofushi, and E. Nakamura, Synthesis, 602-603 (1976).

3. Quaternary Ammonium Enolates as Synthetic Intermediates. Generation of Ester Enolates by the Aid of α-Trimethylsilylesters and Quaternary Ammonium Fluoride, and Their Reactions with Carbonyl Compounds, E. Nakamura, M. Shimizu, and I. Kuwajima, Tetrahedron Lett., 1699-1702 (1976).

2. Quaternary Ammonium Enolates as Synthetic Intermediates. Trimethylsilylacetate: A New Class of Silylating Reagent for Ketones and Alcohols, E. Nakamura, T. Murofushi, M. Shimizu, and I. Kuwajima, J. Am. Chem. Soc., 98, 2346-2348 (1976).

1. Quaternary Ammonium Enolates as Synthetic Intermediates. Regiospecific Alkylation Reaction of Ketones, I. Kuwajima and E. Nakamura, J. Am. Chem. Soc., 97, 3257-3257 (1975).