Asymmetric cyclization reactions. Cyclization of substituted 4-pentenals into cyclopentanone derivatives by rhodium(I) with chiral ligands
作者:Yukari Taura、Masakazu Tanaka、Xiao-Ming Wu、Kazuhisa Funakoshi、Kiyoshi Sakai
DOI:10.1016/s0040-4020(01)80954-6
日期:1991.1
Asymmetric cyclization of substituted 4-pentenals (Ia,b,c; IIa,b,c,d) by Rh(I) with chiral ligands was tested, and substrate (IId) with a bulkier substituent at C4 underwent more stereoselective cyclization by Rh(I)-((+)-DIPMC) to yield substituted cyclepentanone (IIID). The Rh(I) with (+)-DIPMC was found to proceed in a different manner from the Wilkinson-catalyzed cyclization.
测试了Rh(I)与手性配体对取代的4-戊烯(Ia,b,c; IIa,b,c,d)的不对称环化作用,并在C 4处具有更大取代基的底物(IId)通过Rh(I)-((+)-DIPMC)生成取代的环戊酮(IIID)。发现具有(+)-DIPMC的Rh(I)以不同于威尔金森催化的环化的方式进行。