Two novel biphenyls, 2,2′-bis(1-hydroxyethyl)-3,3′,5,5′-tetramethylbiphenyl (7) and 2,2′-bis(1-hydroxyethyl)-4,4′,6,6′-tetramethylbiphenyl (13) were synthesized through Wittig reaction, photochemical oxidative cyclization, and ozonolysis, using xylene and mesitylene as starting materials. The novel approach is applicable to both symmetrical and unsymmetrical biphenyls.
两种新型的双
联苯化合物,2,2'-双(1-羟乙基)-
3,3',5,5'-四甲基双
联苯(7)和2,2'-双(1-羟乙基)-4,4',6,6'-四甲基双
联苯(13),通过Wittig反应、光
化学氧化环合及
臭氧分解,以二
甲苯和
间二甲苯为起始原料合成。该新颖方法是适用于对称和非对称双
联苯合成的通用方法。