作者:Marco Cereghetti、Rudolf Schmid、Peter Schönholzer、Alain Rageot
DOI:10.1016/0040-4039(96)01089-1
日期:1996.7
time with the new resolving agent (R,R)- and (S,S)-2,3-di(phenylamino-carbonyl)tartaric acid (5c) (40–45% weight yields; >99% ee). The diamines (R)- or (S)-2a and 2b were converted with >98% stereochemical retention into the diiodides (R)- and (S)-3a and 3b and subsequently, without loss of optical purity, diphenylphosphinated to the known diphosphines (R)- and (S)-4a and 4b.
在一个更好的方法比已知为(外消旋) -图2a,二胺(外消旋) -图2b是解决首次与新的拆分剂([R ,- [R )-和(小号,小号)-2,3-二(苯基氨基-羰基)酒石酸(5c)(40-45%的重量产率;> 99%ee)。将二胺(R)-或(S)-2a和2b以> 98%的立体化学保留率转化为二碘化物(R)-和(S)-3a和3b,随后在不损失光学纯度的情况下,将二苯膦化成已知的二膦(R)-和(S)-4a和4b。