Organolithium-induced enantioselective alkylative double ring-opening of epoxides: synthesis of enantioenriched unsaturated amino alcohols
摘要:
The use of (-)-sparteine as an external chiral ligand in enantioselective organolithium-induced alkylative double ring-opening of dihydropyrrole epoxides and 7-azanorbornene-type epoxides gives unsaturated acyclic amino alcohols, and amino cyclohexenols in up to 87% ee. (C) 2004 Elsevier Ltd. All rights reserved.
Organolithium-induced enantioselective alkylative double ring-opening of epoxides: synthesis of enantioenriched unsaturated amino alcohols
作者:David M. Hodgson、Christopher R. Maxwell、Timothy J. Miles、Edyta Paruch、Ian R. Matthews、Jason Witherington
DOI:10.1016/j.tet.2004.02.055
日期:2004.4
The use of (-)-sparteine as an external chiral ligand in enantioselective organolithium-induced alkylative double ring-opening of dihydropyrrole epoxides and 7-azanorbornene-type epoxides gives unsaturated acyclic amino alcohols, and amino cyclohexenols in up to 87% ee. (C) 2004 Elsevier Ltd. All rights reserved.
Development of two processes for the synthesis of bridged azabicyclic systems: intermolecular radical addition–homoallylic rearrangements leading to 2-azanorborn-5-enes and neophyl-type radical rearrangements to 2-azabenzonorbornanes
作者:David M. Hodgson、Magnus W. P. Bebbington、Paul Willis
DOI:10.1039/b306717n
日期:——
Radical thiol additions to 7-azanorbornadienes give 7-thio-substituted 2-azanorbornenes and Barton deoxygenations of 7-azabenzonorbornanols give 2-azabenzonorbornanes. The processes both involve novel nitrogen-directed radicalrearrangements. The kinetics and mechanisms of the reactions are also discussed.