申请人:ELI LILLY AND COMPANY
公开号:EP0059989A1
公开(公告)日:1982-09-15
Compounds of formulae
having use as intermediates in the preparation of analgesic compounds are prepared by reacting a 1,2,5, 6-tetrahydro-4-phenylpyridine compound of the formula
with a propenyl alkylating agent of the formula
wherein:
R1 is hydrogen, hydroxy or C,-C3 alkoxy;
R2 is hydrogen, C1-C5 alkyl or CH2C2-C4 alkenyl;
R4 is hydrogen, C1-C10 alkyl, phenyl C1-C3 alkyl, or CH2C3-C6 cycloalkyl; and X is a good leaving group in the presence of a strong base to provide a 1,4,5,6-tetrahydro-4-phenyl-4-(2-propenyl)-pyridine compound of the formula
wherein:
R1, R2 and R4' are the same as above and reacting said compound with a protonic acid of the formula HB', in which B' is an anion B or B" wherein the product is recovered as the salt in which B' is the anion B or as the free base of a salt in which B is exchanged for the anion B".
式化合物
通过式 1,2,5,6-四氢-4-苯基吡啶化合物与式 1,2,5,6-四氢-4-苯基吡啶化合物
与式中的丙烯基烷基化剂反应制备
其中
R1 是氢、羟基或 C,-C3烷氧基;
R2 是氢、C1-C5 烷基或 CH2C2-C4 烯基
R4 是氢、C1-C10 烷基、苯基 C1-C3 烷基或 CH2C3-C6 环烷基;以及 X 是良好的离去基团,在强碱存在下,可得到式中的 1,4,5,6-四氢-4-苯基-4-(2-丙烯基)-吡啶化合物
其中
R1、R2 和 R4'与上述相同,将上述化合物与式 HB'(其中 B'为阴离子 B 或 B")的质子酸反应,其中产物以 B'为阴离子 B 的盐或以 B 交换为阴离子 B "的盐的游离碱的形式回收。