Reactions of coordinated phosphines and arsines: stereoselective reactions at the chlorophosphine-P stereocentre in the complex [(R ★), (R★, R★)]-(±)-[(η5-C5H5){1,2-C6H4(PMePh)2}-Fe(PClMePh)]PF6·CH2Cl 2
作者:Geoffrey Salem、Geoffrey B. Shaw、Anthony C. Willis、S.Bruce Wild
DOI:10.1016/0022-328x(93)83068-7
日期:1993.2
reaction of ethylmagnesium bromide with the (R★), (R★, R★) diastereomer of the (±)-chloromethylphenylphosphine-iron complexes gives the (±)-ethylmethylphenylphosphine-iron complex with (R★), (R★, R★)I(S*), (R★, R★) = 1/3; benzylmagnesium bromide gives the (±)-benzylmethylphenylphosphine iron complex with (R★), (R★, R★)/(S★), (R★, R★) = 1/8. Sodium borohydride reductions of the (±)-chloromethylphenylphosphine-
(反应- [R ★,- [R ★(±) - - [(η)5 -C 5 H ^ 5)1,2-C 6 H ^ 4(PMePh)2}的Fe(NCMe)] PF 6与(±)在沸腾的二氯甲烷中的-氯甲基苯基膦提供可分离的两种非对映体铁络合物的混合物,在氯膦-P立体中心处为差向异构体。[([R ★),(- [R ★,- [R(SU★)〕 - (±) -和[(小号★),(- [R ★,- [R ★)±) - [(η 5 -C5 H 5)1,2-C 6 H 4(PMePh)2 } Fe(PClMePh)] PF 6,具有非对映体比率(R ★),(R ★,R ★)/(S ★),(R ★,R(su★)= 3/1。(R ★),(R ★,R ★)非对映异构体(具有一分子的二氯甲烷溶剂化)的晶体结构已确定。通过使用旋光性乙腈复杂的,光学纯的[R-[(S ★),([R ★,- [R ★)〕〕 - (+)589(η