Intramolecular Cyclopropanation of Unsaturated Terminal Epoxides
摘要:
Efficient lithium amide-induced intramolecular cyclopropanation of bishomoallylic and trishomoallylic epoxides is described. The methodology is used in an asymmetric synthesis of sabina ketone.
Intramolecular Cyclopropanation of Unsaturated Terminal Epoxides
摘要:
Efficient lithium amide-induced intramolecular cyclopropanation of bishomoallylic and trishomoallylic epoxides is described. The methodology is used in an asymmetric synthesis of sabina ketone.
Dimerization and Isomerization Reactions of α-Lithiated Terminal Aziridines
作者:David M. Hodgson、Philip G. Humphreys、Steven M. Miles、Christopher A. J. Brierley、John G. Ward
DOI:10.1021/jo701901t
日期:2007.12.1
The scope of dimerization and isomerization reactions of α-lithiated terminal aziridines is detailed. Regio- and stereoselective deprotonation of simple terminal aziridines with lithium 2,2,6,6-tetramethylpiperidide (LTMP) or lithium dicyclohexylamide (LiNCy2) generates trans-α-lithiated terminal aziridines. These latter species can then undergo dimerization or isomerization reactions depending on
Intramolecular Cyclopropanation of Unsaturated Terminal Aziridines
作者:David M. Hodgson、Philip G. Humphreys、John G. Ward
DOI:10.1021/ol060101n
日期:2006.3.2
Regio- and stereoselective deprotonation of bishomoallylic terminal N-Bus (Bus = tert-butylsulfonyl)-protected aziridines generate aziridinyl anions that undergo diastereoselective intramolecular cyclopropanation giving trans-2-aminobicyclo[3.1.0]hexanes in good to excellent yields.
Intramolecular Cyclopropanation of Unsaturated Terminal Epoxides
作者:David M. Hodgson、Ying Kit Chung、Jean-Marc Paris
DOI:10.1021/ja047346k
日期:2004.7.1
Efficient lithium amide-induced intramolecular cyclopropanation of bishomoallylic and trishomoallylic epoxides is described. The methodology is used in an asymmetric synthesis of sabina ketone.