Preparation of chiral diimino- and diaminodiphosphine ligands and their CuI and AgI complexes. X-ray crystal structures of [Cu(1S,2S-cyclohexyl-P2N2)][PF6] and [Ag(1R,2R-cyclohexyl-P2N2H4)][BF4]
作者:Wai-Kwok Wong、Tat-Wai Chik、Kin-Ning Hui、Ian Williams、Xue Feng、Thomas C.W. Mak、Chi-Ming Che
DOI:10.1016/0277-5387(96)00196-9
日期:1996.9
tetradentate ligand undergoes rapid dissociation to form a tridentate ligand. The interaction of AgBF4 with 1 equiv. of otpically pure L 4 [ L 4 = (R,R)- I , (S,S)- I , (R,R)- II and (S,S)- II gave the corresponding optically pure [AgL4][BF4] complexes, VII–X VII L 4 = (R,R)- I ; VIII , L 4 = (S,S)- I ; IX ,L 4 = (R,R)- II ; X, L 4 = (S,S)- II ] , in good yield. For the AgI complexes, the L4 ligand acted
摘要光学纯的1R,2R-二铵环己烷单-(酒石酸)酒石酸盐与1S,2S-二铵环己烷单-(-)-酒石酸盐的当量相互作用。在2当量存在下的邻-(二苯基膦基)苯甲醛 回流的乙醇/水混合物中加碳酸钾得到光学纯的缩合产物N,N′-双[邻-((二苯基膦基)亚苄基] -1R,2R-二亚氨基环己烷[1R,2R-环己基-P 2 N 2,(R ,R)-I]和N,N′-双[邻-((二苯基膦基)亚苄基] -1S,2S-二亚氨基环己烷[1S,2S-环己基-P 2 N 2,(S,S)-I],产量高。在乙醇中用NaBH4还原光学纯的(R,R)-I和(S,S)-I,得到光学纯的还原产物N,N'-双[o-((二苯基膦基)亚苄基] -1R,2R-二氨基环己烷[ 1R,2R-环己基-P2N2H4,(R,R)-II]和N,N′-双[邻-二苯基膦)亚苄基] -1S,分别以良好的收率得到2S-二氨基环己烷[1S,2S-环己基-P 2 N