ortho-Halogeno Substituents Effect in Asymmetric Cyclization of 4-Aryl-4-pentenals Using a Rhodium Catalyst
作者:Masakazu Fujio、Masakazu Tanaka、Xiao-Ming Wu、Kazuhisa Funakoshi、Kiyoshi Sakai、Hiroshi Suemune
DOI:10.1246/cl.1998.881
日期:1998.9
Asymmetric cyclization of 4-aryl-4-pentenals by using a cationic [Rh((R)-BINAP)]ClO4 afforded (3R)-3-substituted cyclopentanones; on the other hand, the cyclization of 4-pentenals bearing ortho-halogeno phenyl groups afforded the opposite (3S)-ones.
使用阳离子[Rh((R)-BINAP)]ClO4对4-芳基-4-戊烯醛的不对称环化反应生成了(3R)-3-取代的环戊酮;另一方面,带有邻卤素苯基的4-戊烯醛环化反应则生成了相反的(3S)-产物。