Rhodium/phospholane–phosphite catalysts give unusually high regioselectivity in the enantioselective hydroformylation of vinyl arenes
作者:Gary M. Noonan、Christopher J. Cobley、Thomas Mahoney、Matthew L. Clarke
DOI:10.1039/c3cc48823c
日期:——
Using the phospholane–phosphite ligand shown, chemoselectivity to aldehydes, regioselectivity and enantioselectivity are all very high, even using low catalyst loadings and with no solvent.
作者:Garhwal, Subhash、Dong, Yuyang、Mai, Binh Khanh、Liu, Peng、Buchwald, Stephen L.
DOI:10.1021/jacs.4c04287
日期:——
hydride (CuH) catalysis is reported. Key to the success of the method was the use of the mild Lewis acid zinc triflate to promote the formation of oxocarbenium electrophiles through the activation of diethoxymethyl acetate. Using the newly developed protocol, a broad range of vinyl arene substrates underwent efficient hydroacetalization reactions to provide access to highly enantioenriched α-aryl acetal