Synthesis, structure determination and immobilization of some dirhodium complexes with chiral binding thiolato ligands. Investigation of their catalytic activity for enantioselective hydrogenation
作者:Moris Eisen、Pnina Weitz、Sarah Shtelzer、Jochanan Blum、Herbert Schumann、Boris Gorella、Frank H. Görlitz
DOI:10.1016/s0020-1693(00)80368-0
日期:1991.10
1 , a = 16.209(6), b = 14.150(5), c=9.899(3) A, Z = 2, R = 0.058, Rw = 0.094). Complex 5b was found to exist in the crystal as a pair of 1R,2R,5S- and 1S,2R,5S-epimers. Both chiral complexes have been immobilized by attachment to divinylbenzene-crosslinked polystyrene resins. Application of the chiral dirhodium complexes as catalysts for hydrogenation of methyl α-acetamidocinnamate revealed that while
摘要(-)-顺[二羰基-μ-氯-[μ-6,6-二甲基双环[3.1.1]庚烷-2-甲硫基-S:S)]]双[三(1,1-二甲基乙基)膦]铑(5a)和(+)-顺-[二羰基-μ-氯-[μ-5β-甲基-2α-(1-甲基-乙基)环己烷硫基-S:S]]双[三(1,1-二甲基乙基) [Rh(CO)2] 2(μ-Cl)2,P(t-Bu)3和相应的硫化物(-)-顺式-(硫杂环丁烷)三甲基硅烷(4a)和(+)-(新庚烷硫基)三甲基硅烷(4b)。通过单晶X射线衍射确定5a和5b的分子结构(5a:C2221,a = 13.749(4),b = 23.509(9),c = 27.271(9)A,Z = 8,R = 0.0443,Rw =0.0491。5b:P 1,a = 16.209(6),b = 14.150(5),c = 9.899(3)A,Z = 2,R = 0.058,Rw = 0.094)。发现络合物5b以