coupling of silylphosphines with 2-halobenzenecarboxylates or 2-halophenyl ethers, catalyzed with zero-valent palladium complexes can not be used as a procedure for preparing sterically hindered tertiary phosphines. The latter compounds can be successfully prepared by means of phosphorylation of corresponding o -lithiated derivatives.
甲
硅烷基膦与2-卤代
苯甲酸酯或2-卤代
苯基醚的交叉偶联(用零价
钯络合物催化)不能用作制备位阻叔膦的方法。可以通过相应的 邻-
锂化衍
生物的
磷酸化成功地制备后一种化合物 。