Convergent Stereocontrol in Peterson Olefinations. Application to the Synthesis of (±)-3-Hydroxybakuchiol and Corylifolin
作者:Joe B. Perales、Narubumi F. Makino、David L. Van Vranken
DOI:10.1021/jo0259459
日期:2002.9.1
stereospecific sila-Pummerer rearrangement, they made it possible to stereoselectively generate E olefins without isolation or separation of syn- and anti-beta-silyl alkoxides. Addition of a neopentyl alpha-silyl alkyllithium intermediate to an aryl aldehyde generated a mixture of syn- and anti-beta-silyl alkoxides. The syn-beta-silyl alkoxide eliminated stereospecifically at -78 degrees C to give an E olefin, whereas