Catalytic Asymmetric Torgov Cyclization: A Concise Total Synthesis of (+)-Estrone
作者:Sébastien Prévost、Nathalie Dupré、Markus Leutzsch、Qinggang Wang、Vijay Wakchaure、Benjamin List
DOI:10.1002/anie.201404909
日期:2014.8.11
dinitro‐substituted disulfonimide, is described. The reaction delivers the Torgov diene and various analogues with excellent yields and enantioselectivity. This method was applied in a very short synthesis of (+)‐estrone.
CuH-Catalyzed Enantioselective Desymmetrization of Cyclic 1,3-Diketones
作者:Vaibhav B. Patil、Sandip B. Jadhav、Jagadeesh Babu Nanubolu、Rambabu Chegondi
DOI:10.1021/acs.orglett.2c03359
日期:2022.11.11
cyclopentane-1,3-diones to access cyclic 3-hydroxy ketones having an all-carbonquaternarycenter with high diastereoselectivity via hydrosilylation using PMHS as an inexpensive hydride source. This reaction displays high functional group tolerance including reducible alkyne, alkene, and ester groups with a broad substrate scope. The importance of chiral cyclic 3-hydroxy ketone building blocks was also demonstrated
在此,我们报告了 CuH 催化的前手性环戊烷-1,3-二酮的不对称去对称化,使用 PMHS 作为廉价的氢化物源,通过氢化硅烷化反应获得具有全碳季中心和高非对映选择性的环状 3-羟基酮。该反应显示出高官能团耐受性,包括具有广泛底物范围的可还原炔烃、烯烃和酯基团。手性环状 3-羟基酮结构单元的重要性也通过 (-)-雌酮、毒柯烯烷 E 核心和稠合吲哚的合成得到证明。