The synthesis of chiral functionalised morpholine N-oxides using a tandem Cope elimination/reverse-Cope elimination protocol
摘要:
Hydroxylamine derivatives of (S)-prolinol have been generated using a Cope elimination. These undergo reverse-Cope elimination onto a pendant double bond to give morpholine N-oxides containing three contiguous chiral centres. (C) 2004 Published by Elsevier Ltd.
The diastereoselective synthesis of functionalised isoxazolidines using a Cope elimination/intramolecular nitrone cycloaddition strategy
作者:Ian A O'Neil、V.Elena Ramos、Gemma L Ellis、Ed Cleator、Alan P Chorlton、David J Tapolczay、S.Barret Kalindjian
DOI:10.1016/j.tetlet.2004.03.041
日期:2004.4
Functionalised hydroxylamine derivatives of (S)-prolinol prepared by a Cope elimination have been found to undergo oxidation to the nitrone either in the presence of air or a catalytic quantity of TPAP. These undergo intramolecular cycloaddition to give tricyclic isoxazolidines with high diastereoselectivity.
The synthesis of chiral functionalised morpholine N-oxides using a tandem Cope elimination/reverse-Cope elimination protocol
作者:Ian A O'Neil、Ed Cleator、V Elena Ramos、Alan P Chorlton、David J Tapolczay
DOI:10.1016/j.tetlet.2004.03.040
日期:2004.4
Hydroxylamine derivatives of (S)-prolinol have been generated using a Cope elimination. These undergo reverse-Cope elimination onto a pendant double bond to give morpholine N-oxides containing three contiguous chiral centres. (C) 2004 Published by Elsevier Ltd.