The asymmetric cyclisation of substituted pent-4-enals by a chiral rhodium phosphine catalyst
作者:Brian R. James、Charles G. Young
DOI:10.1039/c39830001215
日期:——
Treatment of the racemic disubstituted pent-4-enals (1) and (2) at ca. 150 °C with the chiral complex [Rh(chiraphos)2]Cl [chiraphos = 2S,3S-bis(diphenylphosphino)butane] results in a cyclisation reaction and catalytic asymmetric synthesis of the 2,2- and 3,3-disubstituted cyclopentanones (3) and (4), respectively.
外消旋二取代的戊-4-烯的处理(1)和(2)大约在。150°C与手性配合物[Rh(chiraphos)2 ] Cl [chiraphos = 2 S,3 S-双(二苯基膦基)丁烷]导致环化反应和2,2-和3,3-催化不对称合成双取代的环戊酮(3)和(4)。