作者:Jean-Jacques Brunet、Montserrat Gómez、Hassane Hajouji、Denis Neibecker
DOI:10.1016/0022-328x(93)83419-v
日期:1993.12
An improved, 90% yield synthesis of the chiral diphosphole, (R,R)-DIPPOP (1) is reported. The reactions of 1 with nickel, palladium, platinum and rhodium complexes are examined. 1 does not react with NiCl2. With PdCl2 and PtCl2, it forms various cis and trans diphosphine-bridged cyclooligomers of undetermined ring size. The rhodium complexes [Rh(cod)(2)]BF4, [Rh(acac)(cod)] and Rh(mu-Cl)(cod)}(2) are good precursors for the synthesis of [Rh(cod)(R,R)-DIPPOP}]BF4, (8), [Rh(acac)(R,R)-DIPPOP}], (9), and Rh(cod)Cl}(2)mu-P,P'-(R,R)-DIPPOP}, (10), which are fully characterized by multinuclear NMR spectroscopy.