Ring-Closing of 1,7- and 1,8-Enynes of Propargylic O,O-Acetals by Ruthenium-Catalysed Intramolecular Metathesis
作者:Don Antoine Lanfranchi、Christophe Bour、Bastien Boff、Gilles Hanquet
DOI:10.1002/ejoc.201000305
日期:2010.9
Acyclic 1,7- and 1,8-enynes with the alkyne moiety directly connected to the asymmetric carbon of an ethyl acetal have been obtained in two steps from the corresponding aldehydes. Ring-closing metathesis of these enynes delivered the corresponding six- and seven-membered cyclic 1,3-dienes in moderate-to-excellent yields. A competitive ethylene insertion into the alkyne moiety leading to trienes was observed
Enantioselective Access to Key Intermediates for Salvinorin A and Analogues
作者:Don Antoine Lanfranchi、Christophe Bour、Gilles Hanquet
DOI:10.1002/ejoc.201100207
日期:2011.5
Access to enantiopure synthetic platforms that can generate keyintermediates for salvinorin A analogues through diastereoselective Diels-Alder cycloaddition between an enantiopure sulfinylquinone and semicyclic dienes is described.
描述了通过对映体纯亚磺酰基醌和半环二烯之间的非对映选择性 Diels-Alder 环加成反应,获得对映体纯合成平台的途径,该平台可以生成 Salvinorin A 类似物的关键中间体。