Synthesis of 3-Substituted 2-Oxo-1,4-thiazines and Evaluation of Their Protective Effect against Endotoxin Shock in Mouse.
作者:Hiroaki YAMAZAKI、Hidenori HARADA、Kennichi MATSUZAKI、Tetsuo WATANABE、Hirohisa SAITO
DOI:10.1248/cpb.40.1025
日期:——
5-Methyl-2, 3-dioxo-2H, 4H-1, 4-thiazine (7) was obtained by the oxidation of 5-methyl-2H-1, 4-thiazin-3(4H)-one (5) with m-chloroperbenzoic acid in MeOH, followed by acid hydrolysis of the resulting 2, 2-dimethoxy-1, 4-thiazine (6). 3-Chloro-2-oxo-1, 4-thiazine (10), which was obtained from 7 by heating with phosphorous oxychloride, reacted with various nucleophiles to give 3-substituted 2-oxo-1, 4-thiazines (11a-y). Some of these 2-oxo-1, 4-thiazines, 11a-b, e, o and r-s, showed a protective effect against endotoxin shock in D-galactosamine-sensitized mice.
5-甲基-2, 3-二氧基-2H, 4H-1, 4-噻唑啉(7)是通过用m-氯过苯甲酸在甲醇中氧化5-甲基-2H-1, 4-噻唑-3(4H)-酮(5),然后对所得的2, 2-二甲氧基-1, 4-噻唑啉(6)进行酸水解得到的。3-氯-2-氧基-1, 4-噻唑啉(10)是通过将7与氧氯化磷加热反应得到的,它与多种亲核试剂发生反应生成3-取代的2-氧基-1, 4-噻唑啉(11a-y)。其中一些2-氧基-1, 4-噻唑啉,11a-b、e、o和r-s,表现出对D-半乳糖胺敏感小鼠的内毒素休克具有保护作用。