作者:Jan Romanski、Piotr Nowak、Christian Chapuis、Janusz Jurczak
DOI:10.1016/j.tetasy.2011.04.014
日期:2011.4
Enantiomerically pure (+)-(5S)-dihydroyashabushiketol 1a was obtained by the 1,3-dipolar cycloaddition of a nitrile oxide, generated from oxime 3b, to N-acryloyl bornane[10,2]sultam (2R)-2 (67%, 85% de, then crystallization 81%, 99% de), followed by reduction with DIBAL-H to aldehyde (-)-6a (67%), Wittig reaction to isoxazoline (E/Z)-7 (60%), and finally hydrolytic hydrogenation (62%). (C) 2011 Elsevier Ltd. All rights reserved.