Enantioselective counter-anions in photoredox catalysis: The asymmetric cation radical Diels-Alder reaction
作者:Peter D. Morse、Tien M. Nguyen、Cole L. Cruz、David A. Nicewicz
DOI:10.1016/j.tet.2018.03.052
日期:2018.6
comprised of an oxidizing pyrilium salt bearing a chiral N-triflyl phosphoramide anion. This class of chiral organic photoredox catalysts is able to catalyze the formation of cation radical-mediated Diels-Alder transformations in up to 75:25 e.r. in both intramolecular and intermolecular examples.
Metal-Catalyzed [2+2+1] Cycloadditions of 1,3-Dienes, Allenes, and CO
作者:Paul A. Wender、Mitchell P. Croatt、Nicole M. Deschamps
DOI:10.1002/anie.200600300
日期:2006.4.3
US6022531A
申请人:——
公开号:US6022531A
公开(公告)日:2000-02-08
Rhodium(I)-Catalyzed [4+2+2] Cycloadditions of 1,3-Dienes, Alkenes, and Alkynes for the Synthesis of Cyclooctadienes
作者:Paul A. Wender、Justin P. Christy
DOI:10.1021/ja060878b
日期:2006.4.1
The first [4+2+2] cycloadditions involving terminal alkynes and diene-enes, including a fully intramolecular example, are reported resulting in the formation of cyclooctadienes using [RhCl(CO)2]2 (5 mol %) treated with AgSbF6 (10 mol %) as a precatalyst. The reaction is general for a variety of terminal alkynes, as well as variously substituted diene-enes (yields up to 88%).