New procedures for the resolution of chiral tert-butylphenylphosphine oxide and some of its reactions
作者:Józef Drabowicz、Piotr Łyżwa、Jan Omelańczuk、K.Michał Pietrusiewicz、Marian Mikołajczyk
DOI:10.1016/s0957-4166(99)00264-5
日期:1999.7
diastereoisomeric complexes with (+)-(R)-1,1′-binaphthalene-2,2′-diol and (+)-(S)-mandelic acid. With the latter complexing agent, separation of the essentially enantiopure (−)-(S)-enantiomer was achieved in a single complexation process. Addition of paraformaldehyde to this enantiomer gave α-hydroxymethyl-t-butylphenylphosphine oxide with high stereoselectivity and retention of configuration at phosphorus
外消旋的叔丁基苯基氧化膦是通过与(+)-(R)-1,1'-双萘-2,2'-二醇和(+)-(S)-扁桃酸的非对映异构体配合物拆分而得到的。使用后一种络合剂,可以在单个络合过程中分离出基本对映体(-)-(S)-对映体。向该对映异构体中添加多聚甲醛可得到具有高立体选择性和磷保持结构的α-羟甲基-叔丁基苯基膦氧化物,同时它与溴乙酸甲酯在甲醇/甲醇钠中的反应导致形成叔丁基苯基次膦酸甲酯,并在磷下转化。