Ene reaction mechanisms. 2. Regioselectivity with N-aryl-N'-p-tosylsulfur diimides as enophiles. Crystal structure of N-(pentafluorophenyl)-N'-p-tosylsulfur diimide
Diastereoselective Rhodium-Catalyzed Ene-Cycloisomerization Reactions of Alkenylidenecyclopropanes: Total Synthesis of (−)-α-Kainic Acid
作者:P. Andrew Evans、Phillip A. Inglesby
DOI:10.1021/ja210804r
日期:2012.2.29
The rhodium-catalyzed ene-cycloisomerization of alkenylidenecyclopropanes provides an atom-economical approach to five-membered carbo- and heterocycles that contain two new stereogenic centers. A key and striking feature of this protocol is that the alkene geometry does not impact the efficiency and diastereocontrol, which provides excellent synthetic versatility. For instance, (E)- and (Z)-allylic