Thiazole analogs of benzomorphans. I. Synthesis of novel thiazolo(4,5-f)morphans.
作者:KIMIO KATSUURA、MASAO OHTA、KEMMOTSU MITSUHASHI
DOI:10.1248/cpb.30.4378
日期:——
The synthesis and analgesic properties of thiazolo [4, 5-f] morphans (XIIa-c) are described. Monothiazolization of ethyl 2-methyl-1, 3-dioxo-2-cyclohexaneacetate (I) afforded the 2-aminothiazole derivative (II), which was deaminated to ethyl 4, 5, 6, 7-tetrahydro-4-methyl-5-oxo-4-benzothiazoleacetate (V) by means of the Sandmeyer reaction and subsequent hydrogenolysis of the resulting chloride (IVa). In several steps, V was converted to 2, 5-dimethyl-9-oxothiazolo [4, 5-f] morphan (X). Thiazolo [4, 5-f] morphan derivatives (XIIa-c) were synthesized from this key intermediate (X).
本文介绍了噻唑并[4,5-f]吗喃(XIIa-c)的合成和镇痛特性。将 2-甲基-1,3-二氧代-2-环己烷乙酸乙酯(I)单噻唑化后得到 2-氨基噻唑衍生物(II),通过桑德迈尔反应将其脱氨为 4,5,6,7-四氢-4-甲基-5-氧代-4-苯并噻唑乙酸乙酯(V),随后将得到的氯化物(IVa)进行氢解。经过几个步骤,V 被转化为 2,5-二甲基-9-氧代噻唑并 [4,5-f] 吗喃(X)。噻唑并 [4, 5-f] 吗啡衍生物(XIIa-c)就是由这个关键的中间体(X)合成的。