Rh-Catalyzed Borylative Cyclization of Acrylate-Containing 1,6-Enynes
作者:Zhantao Yang、Zhiqiang Yu、Yulin He、Wei Feng、Yinchao Zhang、Junjie Wang、Xiangtao Kong、Chun-Hua Yang
DOI:10.1021/acs.orglett.3c02154
日期:2023.8.4
A Rh-catalyzed regioselective, stereoselective carbocyclization/borylation of acrylate-containing 1,6-enynes was described, which offers a general and practical method for constructing versatile and densely functionalized pyrrolidines with the (Z) geometry or the uncommon (E) geometry at the double bond with different substituents of the alkyne, with sterically hindered and conjugative aryl groups
Asymmetric Synthesis of Bicyclic Ketones Having an Angular Substituent via Ti(II) Alkoxide-Mediated Tandem Cyclization of Trisubstituted Olefinic Substrates
作者:Hirokazu Urabe、Daigaku Hideura、Fumie Sato
DOI:10.1021/ol9904038
日期:2000.2.1
[reaction: see text] Angularly substituted, optically active bicyclic ketones of up to 94% ee were prepared by the Ti(II) alkoxide-mediated tandem cyclization of open-chain substrates, that is, 8-phenylmenthyl enynoates having a trisubstituted double bond.