An Efficient Procedure for the Direct Nucleophilic Substitution of the Abiko-Masamune Auxiliary
作者:Dirk Menche、Jun Li、Pengfei Li
DOI:10.1055/s-0029-1217819
日期:2009.9
An efficient method for the nucleophilic displace-ment of the Abiko-Masamune auxiliary is reported, which involves i-PrMgCl for intermediate ester activation.
An Enantiospecific Approach to Tetraquinane Diterpenes Crinipellins: Synthesis of Norcrinipellins
作者:A. Srikrishna、V. Gowri
DOI:10.1055/s-0031-1289533
日期:2011.11
enantiospecific approach to the synthesis of tetraquinane diterpene crinipellins is described. The cyclopentane ring in campholenaldehyde was identified as the Bring. Two rhodium carbenoid CH insertion reactions for the construction of A and Crings and an intramolecular Michael addition reaction for the Dring of crinipellins were employed as key strategies for the enantiospecific synthesis of norcrinipellins
描述了一种合成四喹烷二萜 crinipellins 的对映特异性方法。樟脑醛中的环戊烷环被鉴定为 B 环。用于构建 A 和 C 环的两种铑卡宾 CH 插入反应和用于 crinipellins 的 D 环的分子内迈克尔加成反应被用作对映体特异性合成去甲crinipellins 的关键策略。