Chelation-Controlled Intermolecular Alkene and Alkyne Hydroacylation: The Utility of β-Thioacetal Aldehydes
作者:Michael C. Willis、Helen E. Randell-Sly、Robert L. Woodward、Gordon S. Currie
DOI:10.1021/ol050638l
日期:2005.5.1
beta-Thioacetal-substituted aldehydes, which are conveniently prepared from the corresponding ynals, can be combined with a range of alkynes or electron-poor alkenes to deliver intermolecular hydroacylation adducts. The reactions employ [Rh(dppe)]ClO4 as a catalyst and are proposed to proceed via a chelated rhodium acyl intermediate. The thioacetal-containing products can be deprotected to the corresponding ketones or reduced to alkanes in good yields.