(1S,2S)-1,2-Bis(diphenylphosphinoxy)cyclohexane, (1S,2S)-1,2-bis(phosphinomethyl)cyclohexanes, (2R,3R)-2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis(phosphino) butanes, and (1R,2R)-1,2-bis(phosphinomethyl) cyclobutanes, whose phosphino groups were diphenylphosphino or 5H-dibenzophosphol-5-yl groups where the rotation of phenyl-P bonds is impossible, were used as chiral ligands in rhodium-catalyzed asymmetric hydroformylation. The highest stereoselectivity was attained by the use of (1R,2R)-1,2-bis(5H-dibenzophosphol-5-ylmethyl)cyclobutane or (2R,3R)-2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis(5H-dibenzophosphol-5-yl)butane.
(1S,2S)-1,2-双(
二苯基膦氧基)
环己烷、(1S,2S)-1,2-双(膦甲基)
环己烷、(2R,3R)-2,3-O-异亚丙基-2,3-二羟基-1,4-双(膦基)
丁烷和(1R,2R)-1,2-双(膦基甲基)
环丁烷,其膦基为
二苯基膦基或5H-二苯并
磷基-5-基,其中苯基-P的旋转键是不可能的,被用作
铑催化的不对称加氢甲酰化中的手性
配体。通过使用(1R,2R)-1,2-双(5H-二苯并
磷基-5-基甲基)
环丁烷或(2R,3R)-2,3-O-异亚丙基-2,3-二羟基获得了最高的立体选择性-1,4-双(5H-二苯并
磷基-5-基)
丁烷。