Highly Enantioselective Hydroformylation of Olefins Catalyzed by Rhodium(I) Complexes of New Chiral Phosphine−Phosphite Ligands
作者:Kyoko Nozaki、Nozomu Sakai、Tetsuo Nanno、Takanori Higashijima、Satoshi Mano、Toshihide Horiuchi、Hidemasa Takaya
DOI:10.1021/ja970049d
日期:1997.5.1
1‘-binaphthalen-2‘-yl (S)-1,1‘-binaphthalene-2,2‘-diyl phosphite [(R,S)-BINAPHOS, (R,S)-2a], was synthesized. Its Rh(I) complex was prepared, and its structure has been characterized by 1H and 31P NMR spectroscopy. Using Rh(I) complexes of (R,S)-2a and its enantiomer, highly enantioselective hydroformylation of styrene has been performed (94% ee, iso/normal = 88/12). The catalyst system was also effective
一种新的手性膦-亚磷酸酯配体,(R)-2-(diphenylphosphino)-1,1'-binaphthalen-2'-yl (S)-1,1'-binaphthalene-2,2'-diyl phosphite [(R ,S)-BINAPHOS, (R,S)-2a],合成。制备了其Rh(I)配合物,并通过1H和31P NMR光谱对其结构进行了表征。使用 (R,S)-2a 及其对映异构体的 Rh(I) 配合物,已经进行了苯乙烯的高度对映选择性加氢甲酰化 (94% ee, 异/正 = 88/12)。该催化剂体系对多种其他烯烃也有效。其他一些带有 1,1'-联萘和联苯骨架的膦-亚磷酸酯配体,例如 (S)-3,3'-dichloro-6-(diphenylphosphino)-2,2',4,4'-tetramethylbiphenyl-6' -yl (R)-1,1'-联萘-2,2'-二基亚磷酸酯