Synthesis of 1,1-Disubstituted Alkyl Vinyl Sulfides via Rhodium-Catalyzed Alkyne Hydrothiolation: Scope and Limitations
作者:Jun Yang、Anthony Sabarre、Lauren R. Fraser、Brian O. Patrick、Jennifer A. Love
DOI:10.1021/jo801644s
日期:2009.1.2
catalyst for alkyne hydrothiolation with alkyl thiols. In general, catalytichydrothiolation proceeds in high yields and with high regioselectivity for a wide range of alkynes and thiols. A variety of functional groups were well-tolerated, including nitriles, amines, halogens, ethers, esters and silanes, although strongly coordinating groups were found to be incompatible with hydrothiolation. Both sterically
Rhodium-Catalyzed Alkyne Hydrothiolation with Aromatic and Aliphatic Thiols
作者:Changsheng Cao、Lauren R. Fraser、Jennifer A. Love
DOI:10.1021/ja055096h
日期:2005.12.1
a potentially attractive method for the formation of vinylsulfides, which are valuable synthetic intermediates. Known methods for hydrothiolation using alkyl thiols are quite limited. We report herein that Tp*Rh(PPh3)2 (Tp* = hydrotris(3,5-dimethylpyrazolyl)borate) is a highly active catalyst for alkyne hydrothiolation with alkyl and aryl thiols. Hydrothiolation using alkyl thiols proceeds with excellent
green procedure for the synthesis of Markovnikov i.e. branched vinyl sulfides in aqueous media was developed by employing the dinuclear Rh(I) complexes of hydrophilic phosphines as catalysts in the alkyne hydrothiolation with aliphatic thiols. Deuterium-labeling studies provide evidence for the aptness of these dinuclear catalysts to form selectively the Markovnikov syn-addition products. Catalyst order