Palladium(II)-assisted dialkylation and alkylation/acylation of optically active ene carbamates via trialkylorganostannane cross-coupling and carbonylative coupling processes
作者:John J. Masters、Louis S. Hegedus、Joaquin Tamariz
DOI:10.1021/jo00019a038
日期:1991.9
Alkylation of benzyl vinyl carbamate and propene with the anions of diethyl methylmalonate or dimethyl malonate in the presence of palladium (II) chloride, followed by cross-coupling or carbonylative cross-coupling with organostannanes, effected an overall dialkylation or alkylation/acylation of the monoolefin substrate. Complete control of stereochemistry in this palladium(II)-assisted reaction was observed using optically active ene carbamates affording beta-amino-unsaturated keto esters in good chemical yields and excellent optical purity.