作者:Henri Brunner、Peter Faustmann、Bernhard Nuber
DOI:10.1016/s0022-328x(97)00745-6
日期:1998.4
diastereomers of 1 (L=P(OMe)3, L*=PPh2N(Me)CH(Me)(Ph)), 2 (L=PPh3, L*=CNCH(Me)(Ph)), 7 (L=PMe2Ph, L*=glyphos) and 8. The ratios achieved are 74:26 (1a:1b), 79:21 (2a:2b), 71:29 (7a:7b) and 74:26 (8a:8b). The crystal structures of six complexes were determined. For (SCo,SC)-2a, (RCo,SC)-3b and (SCo,RC,RC)-8a the absolute configuration could be established. The cobalt center is configurationally stable at room
在两步合成中,从Co(CO)3(NO)中获得了仅在钴原子上的构型不同的非对映异构体Co(CO)(NO)(L)(L * )。L是单齿亚磷酸酯或膦,而L *是单齿光学活性膦或异氰化物。对于复杂的8(L = PPH 3,L =苯基tarpholane)的55:45非对映体之比(图8a:图8b)在合成后发现。对于所有其他配合物,该比例为50:50。通过结晶,可以获得富集了以下一种非对映异构体的样品:1(L = P(OMe)3,L * = PPh 2 N(Me)CH(Me)(Ph)),2(L = PPh 3, L * = CNCH(Me)(Ph)),图7(L = PMe 2 Ph,L * =草甘膦)和8。达到的比例为74:26(1a:1b),79:21(2a:2b),71 : 29(7a:7b)和74:26(8a:8b)。确定了六个配合物的晶体结构。对于(S Co,S C)-2a,(R Co,S C)-3b和(S