Synthese de l'acide (dihydroxy-5,7 dioxo-9,25ethyl-16 heptamethyl-2,4,6,12,18,22,24 methoxy-3) hexacosatriene-12,16,20oique par copulation de 3 synthons希罗
Synthese de l'acide (dihydroxy-5,7 dioxo-9,25ethyl-16 heptamethyl-2,4,6,12,18,22,24 methoxy-3) hexacosatriene-12,16,20oique par copulation de 3 synthons希罗
Control of diastereofacial selectivity in the epoxidation of rigid allylic ethers.
作者:Gérad Mandville、Mohammed Ahmar、Robert Bloch
DOI:10.1016/s0040-4039(00)60360-x
日期:1993.3
Epoxidation of the strained allylic ethers 7 proceeds with low or very high diastereofacialselectivity, depending on the relative configuration of the methyl group next to the allylic alkoxy group. The magnitude of this asymmetric induction is interpreted in terms of transition-state models similar to a model proposed by Houk