Asymmetric synthesis. Asymmetric catalytic hydrogenation using chiral chelating six-membered ring diphosphines

PA MacNeil, NK Roberts, B Bosnich

Index: MacNeil, Patricia A.; Roberts, Nicholas K.; Bosnich, B. Journal of the American Chemical Society, 1981 , vol. 103, # 9 p. 2273 - 2280

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Citation Number: 201

Abstract

Abstract: Rhodium (1) catalysts formed by the two chiral chelating six-membered ring diphosphines, 2, 4-bis (diphenylphosphin0) pentane (skewphos) and 1, 3-bis (diphenylphosphino) butane (chairphos), are efficient catalysts for the hydrogenation of amino acid precursors. The two chiral phosphines differ in that skewphos probably adopts a chiral conformation whereas chairphos probably adopts an achiral conformation. As a ...

~75%

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