摘要:
通式(BIP)ZrCl 2(THF)2(1a - c)的双酚锆锆配合物的立体选择反应,其中BIP = 3,3'- iPr 2 -6,6'-Me 2 -1,1'-联-2-酚盐(a),3,3'- tBu 2 -5,5'-Me 2 -1,1'-联-2-酚盐(b)或3,3',5,5'- t卜4 -1,1'-二-2-酚(Ç)中,用1个当量各种的锂或镁盐的柄型-双(茚基)配位体得到柄-zirconocenes外消旋-C 2 H ^ 4(茚基)2锆(BIP)(图2b),外消旋-Me 2的Si(茚基)2锆(BIP)(图3c),外消旋-Me 2的Si(2-ME-IND)2锆(BIP)(图4c),外消旋-我2 Si(2-Me-4-Ph-Ind)2 Zr(BIP)(5c)和rac-Me 2 Si(2-Me-Benz [ e ] Ind)2 Zr(BIP)(6c)的分离产率为60-75%。C 2 H 4(Ind)2