Reductive cleavage of the carbon phosphorus bond with alkali metals. II. Cleavage of mixed functionalized triarylphosphines; Birch reduction of arylphosphines

…, JHG Frijns, N Meijboom

Index: Doorn, Johannes A. van; Frijns, John H. G.; Meijboom, Nico Recueil des Travaux Chimiques des Pays-Bas, 1991 , vol. 110, # 11 p. 441 - 449

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Abstract

Abstract The reductive cleavage of mixed ortho-and para-functionalized triarylphosphines with Na/NH 3 and Li/THF depends strongly on the nature and positions of the substituents. Reduction occurs readily with phosphines PhAr 2 P (4, 6 and 9) and Ph 2 ArP 19 when the corresponding phosphine Ar 3 P is not reduced. Cleavage of para-substituted compounds 7 and 9 leads to mixtures of secondary phosphines. By contrast, cleavage of mixed ortho- ...