反应详情

2,6-dichloro-4′,5′-dimethoxy-6′-(2′fluorobenzyloxy)-2′-methylbenzophenone (coded BB-2); 6′-benzyloxy-4′,5′-dimethoxy-2,6-dimethyl-2′-methylbenzophenone (coded BB-3); and 5-bromo-2′,6-dimethyl-2,4′,5′,6′-tetramethoxybenzophenone (coded BB-4), most preferred BB-4.