(±)-4-Acetoxy-1-benzyl-6-hydroxy-7-methoxy-2-methyl-1, 2, 3, 4-tetrahydroisoquinolines (3) (R=Me) were proved to be formed by thermal isomerization of o-quinol acetates (2). Reaction of 2 with organic acids gave the (±)-1, 4-trans-and cis-4-acyloxy-1-benzyl derivatives [3 (R=Me, Et, n-C5H11, and tert-Bu)]. With hydrohalic acids, 2 afforded (±)-1-benzyl-5-halogeno-6-hydroxy-7-methoxy-2-methyl-1, 2, 3, 4-tetrahydroisoquinolines [6 (X=Cl, Br)]. Stereochemical aspects of the reactions are discussed.
(±)-4-乙酰氧基-1-苄基-6-羟基-7-甲氧基-2-甲基-1,2,3,4-
四氢异喹啉(3)(R=Me)被证明是通过邻
喹啉乙酸酯(2)的热异构化形成的。2 与有机酸反应生成了 (±)-1、4-反式和顺式-4-乙酰氧基-1-苄基衍
生物 [3(R=Me、Et、n-
C5H11 和叔丁基)]。在氢卤酸的作用下,2 得到了(±)-1-苄基-5-卤代-6-羟基-7-甲氧基-2-甲基-1,2,3,4-
四氢异喹啉[6(X=Cl,Br)]。讨论了反应的立体
化学方面。