Synthetic studies on 2,4-benzothiazepin-5(1H)-one and 2,4-benzodiazepin-1-one derivatives.
作者:HIROSHI FUJITA、YASUNOBU SATO
DOI:10.1248/cpb.23.1764
日期:——
2, 4-Benzothiazepin-5 (1H)-one were usually the predominant products in reactions of o-chloromethylbenzoyl chloride with 1, 3-disubstituted thioureas ; but with methyl, benzyl or allyl substituted thioureas, 2, 4-benzodiazepin-1-ones were obtained together with 2, 4-benzothiazepin-5 (1H)-ones. These structures were elucidated from infrared, ultraviolet and nuclear magnetic resonance spectra. We also found that nature of the base and solvent as well as thiourea substituents affected the course of the reactions affording 2, 4-benzothiazepin-5 (1H)-ones or 2, 4-benzodiazepin-1-ones. Several 2, 4-benzothiazepin-5 (1H)-ones and 2, 4-benzodiazepin-1-ones possessed weak pharmacological activities, such as coronary vasodilating and local anesthetic activity.
2, 4-苯并噻嗪-5(1H)-酮通常是邻氯甲基苯甲酰氯与1,3-双取代硫脲反应中的主要产物;但当硫脲含有甲基、苄基或烯丙基取代基时,会同时得到2, 4-苯并二氮杂䓬-1-酮与2, 4-苯并噻嗪-5(1H)-酮。这些结构通过红外、紫外和核磁共振光谱得以阐明。我们还发现,碱和溶剂的性质以及硫脲的取代基会影响反应的进程,从而生成2, 4-苯并噻嗪-5(1H)-酮或2, 4-苯并二氮杂䓬-1-酮。一些2, 4-苯并噻嗪-5(1H)-酮和2, 4-苯并二氮杂䓬-1-酮具有较弱的药理活性,如冠状动脉舒张和局部麻醉作用。