Asymmetric rearrangement of N-Boc 7-azanorbornene oxide: use of aryllithiums for enantioselective deprotonation
作者:David M. Hodgson、Christopher R. Maxwell、Ian R. Matthews
DOI:10.1016/s0957-4166(99)00168-8
日期:1999.5
The enantioselective α-deprotonation-rearrangement of N-Boc 7-azanorbornene oxide 1 using aryllithiums in the presence of (−)-sparteine 4 or bisoxazolines 5a–c to give azanortricyclanol 2 in up to 87% ee is described.
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.
Enantioselective Alkylative Double Ring Opening of Epoxides: Synthesis of Enantioenriched Unsaturated Diols and Amino Alcohols
作者:David M. Hodgson、Christopher R. Maxwell、Timothy J. Miles、Edyta Paruch、Matthew A. H. Stent、Ian R. Matthews、Francis X. Wilson、Jason Witherington
6-Substituted 2-azabicyclo[2.2.1]hept-5-enes by nitrogen-directed radical rearrangement: synthesis of an epibatidine analogue with high binding affinity at the nicotinic acetylcholine receptorElectronic supplementary information (ESI) available: details of biological studies. See http://www.rsc.org/suppdata/p1/b1/b107414h/
作者:David M. Hodgson、Christopher R. Maxwell、Richard Wisedale、Ian R. Matthews、Kate J. Carpenter、Anthony H. Dickenson、Susan Wonnacott
DOI:10.1039/b107414h
日期:2001.11.29
isomerisation of epoxide 13 gives an azanortricyclanol 17 which is a precursor for a novel free-radical induced rearrangement to 6-substituted 2-azabicyclo[2.2.1]hept-5-enes 28–31. Compound 31 undergoes selective exo-face hydrogenation to give the 6-substituted 2-azabicyclo[2.2.1]heptane 33 (structure confirmed by X-ray crystallographic analysis). Deprotection of 33 gives epibatidine analogue 2 which has been