Synthesis of Sb-chiral organoantimony compounds having intramolecular Sb⋯N interaction and their separation into optically pure compounds via ortho-palladated benzylamine complexes
作者:Satoru Okajima、Shuji Yasuike、Naoki Kakusawa、Atsuko Osada、Kentaro Yamaguchi、Hiroko Seki、Jyoji Kurita
DOI:10.1016/s0022-328x(02)01622-4
日期:2002.8
A diastereomeric mixture of Sb-chiral triarylstibanes having an amine moiety on an aryl group, Sb(R/S)-(aryl)[2-(S)-(1-dimethylaminoethyl)phenyl](p-tolyl)stibanes (4a–c), has been prepared by stepwise nucleophilic displacement of the ethynyl groups on bis(phenylethynyl)(p-tolyl)stibane (1) with Grignard reagents 2a–c and 2-[(S)-(dimethylamino)ethyl]phenyllithium. Although direct separation of the diastereomeric
具有芳基上的胺部分,锑(Sb的手性triarylstibanes的非对映体混合物[R /小号(芳基) - )[2-(小号) - (1-二甲基氨基乙基)苯基](p -甲苯基)stibanes(4A - c)是通过格氏试剂2a - c和2-[(S)-(二甲氨基)乙基]苯基锂通过逐步亲核取代双(苯基乙炔基)(对甲苯基)锡烷(1)上的乙炔基而制备的。尽管无法成功分离4的非对映异构体混合物,但可以通过其钯配合物6轻松分离它们。由stibanes 4与二μ-二氯双(2-二甲基氨基苄基-C 1,N)二铝(II)反应形成的(5)。此处分离的非对映体纯的Sb-手性二苯乙烯基酯是光学稳定的,即使在甲苯或吡啶中于110°C加热24小时,也未观察到在手性锑中心有外消旋作用。Sb(S)-[2-(S)-(1-二甲基氨基乙基)苯基](1-萘基)(对甲苯基)硬脂烷(4b - B)的单X射线晶体分析表明,锑和氮原子。