New chiral phospholanes; Synthesis, characterization, and use in asymmetric hydrogenation reactions
作者:Mark J. Burk、John E. Feaster、Richard L. Harlow
DOI:10.1016/s0957-4166(00)86109-1
日期:1991.1
5-disubstituted-1-phenylphospholanes which are then employed in the preparation of a new series of C2-symmetric bis- and C3-symmetric tris(phospholane) ligands. A versatile three-step route to the important chiral 1,4-diol intermediates, used in the phosphine syntheses, is outlined. Rhodium complexes bearing the new phosphine ligands were prepared and shown to act as efficient catalyst precursors for the enantioselective
我们描述了对映体纯的反式-2,5-二取代-1-苯基膦酸酯的实际合成,然后将其用于制备一系列新的C 2对称双-和C 3对称三(膦)配体。概述了用于膦合成的重要手性1,4-二醇中间体的通用三步路线。制备了带有新的膦配体的铑配合物,并显示出它们可作为对各种不饱和底物进行对映选择性氢化的有效催化剂前体。