Gold(I)-Catalyzed Addition of Thiols and Thioacids to 3,3-Disubstituted Cyclopropenes
作者:Richard J. Mudd、Paul C. Young、James A. Jordan-Hore、Georgina M. Rosair、Ai-Lan Lee
DOI:10.1021/jo300930c
日期:2012.9.7
Gold(I)-catalyzed reactions of thiols, thiophenols, and thioacids with 3,3-disubstituted cyclopropenes occur in a regioselective and chemoselective manner to produce either vinyl thioethers or primary allylic thioesters in good yields. A survey of commonly used gold(I) catalysts shows Echavarren’s cationic gold(I) catalyst to be most tolerant of deactivation by sulfur. A novel digold with bridging
Divergent Outcomes of Gold(I)-Catalyzed Indole Additions to 3,3-Disubstituted Cyclopropenes
作者:Paul C. Young、Maximillian S. Hadfield、Lynn Arrowsmith、Kristina M. Macleod、Richard J. Mudd、James A. Jordan-Hore、Ai-Lan Lee
DOI:10.1021/ol203418u
日期:2012.2.3
Depending on the conditions employed, gold(I)-catalyzed addition of indoles to 3,3-disubstituted cyclopropenes can be controlled to yield either 3-(E)-vinylindoles (3) or bis-indolylalkanes (4). If the cyclopropene substituents are sterically bulky, unprecedented gold-catalyzed oxidation under air occurs to yield bis-indolylalkene (5) and epoxide (6) at room temperature.