number of centers of asymmetry were formed with nearly complete diastereoselectivity. Considerable differences were observed in the ring-closing abilities of the unsubstituted and phenyl-substituted aminonaphthols 1 and 2 and of the regioisomeric compounds 1 and 3.
通过1-(α-
氨基苄基)-
2-萘酚(贝蒂碱:1),1-
氨基甲基-
2-萘酚(2)和2-(α-
氨基苄基)-1-的简单或多米诺环封闭反应
萘酚(反向Betti碱:3)与
光气,苯
甲磺酸乙酯,2-羧基
苯甲醛,
乙酰丙酸,
水杨醛/
福尔马林或
水杨醛/
乙醛,
萘[1,2- e ] [1,3]恶嗪和
萘[2,1-制备了e ] [1,3]恶嗪衍
生物。1和3的所有氮桥多环衍
生物包含许多不对称中心的化合物几乎具有完全非对映选择性。在未取代的和苯基取代的
氨基
萘1和2以及区域异构化合物1和3的闭环能力上观察到相当大的差异。