Rhodium(I)-Catalyzed Hydroacylation/Cycloisomerization Cascade Reaction: Application to the Construction of the Tricyclic Core of Guanacastepenes
作者:Yoshihiro Sato、Yoshihiro Oonishi、Ai Taniuchi
DOI:10.1055/s-0030-1258184
日期:2010.9
developed a novel rhodium(I)-catalyzed cascade reaction involving the hydroacylation of a 4,6-dienal followed by cycloisomerization of the resulting 1,3-diene with an alkene, giving carbocycles containing a bicyclo[5.3.0]decenone skeleton in a stereoselective manner. Herein, we report the construction of the C5,C7,C6-tricyclic core of guanacastepenes using this cascade reaction. rhodium - cascade reactions
Meerwein, Justus Liebigs Annalen der Chemie, 1908, vol. 358, p. 82
作者:Meerwein
DOI:——
日期:——
Lipase-catalyzed Knoevenagel condensation between α,β-unsaturated aldehydes and active methylene compounds
作者:Zhi Wang、Chun-Yu Wang、Hao-Ran Wang、Hong Zhang、Ya-Lun Su、Teng-Fei Ji、Lei Wang
DOI:10.1016/j.cclet.2014.03.036
日期:2014.5
A simple and efficient Knoevenagel condensation between α,β-unsaturatedaldehydes and active methylene compounds is reported. Notably, this condensation can be catalyzed by PPL (lipase from porcine pancreas) with satisfied yields (49%–92%). Moreover, PPL induces moderate Z/E selectivity in the Knoevenagel condensation.
Mechanistic Study on Gold-Catalyzed Cycloisomerization of Dienediynes Involving Aliphatic C–H Functionalization and Inspiration for Developing a New Strategy to Access Polycarbocycles
作者:Yi Wang、Pei-Jun Cai、Zhi-Xiang Yu
DOI:10.1021/jacs.9b10362
日期:2020.2.12
generate a cis-1-alkynyl-2-alkenylcyclopropane. Then, a Cope rearrangement takes place to give a seven-membered-ring allene intermediate, whose central carbon atom possesses vinyl cationcharacter and thus is highlyreactive toward aliphatic C-H insertion. After the C-H insertion, two successive [1,2]-hydride shifts then occur to give the tricyclic product and to complete the catalytic cycle. Notably