Novel quinazoline-dione compounds, process for production thereof and pharmaceutical use thereof
申请人:Ishikawa, Masayuki
公开号:EP0040793A1
公开(公告)日:1981-12-02
A 5,6,7-substituted-2,4 (1H,3H)-quinazolinedione compound of the formula (I),
wherein R1, R2, R3, A and B as defined in claim 1 and its acid addition salt; and a vasodilating and hypotensive composition containing the aforesaid compound.
一种式(I)的 5,6,7-取代的-2,4(1H,3H)-喹唑啉二酮化合物、
其中 R1、R2、R3、A 和 B 如权利要求 1 所定义及其酸加成盐;以及含有上述化合物的血管扩张和降血压组合物。
US4405623A
申请人:——
公开号:US4405623A
公开(公告)日:1983-09-20
Thermal elimination of carbonyl sulfide from O-aryl thionocarbonates of pyrrolidine-, piperidine-, and tetrahydrothiophene-2-ethanol.
Pyrolysis of O-2-(1-benzyl-2-pyrrolidinyl and 2-piperidyl)ethyl O-phenyl thionocarbonates (4 and 25) in acetonitrile gave 1-benzyl-4-phenoxyhexahydro-1H-azepine (7) and 1-benzyl-4-phenoxyoctahydroazocine (26) with liberation of COS in 55% and 32% yields, accompanied with 2-(2-phenoxyethyl)pyrrolidine and piperidine (8 and 27), via the azetidinum intermediate (6). On the other hand, O-phenyl O-2-(2-tetrahydrothienyl)ethyl thionocarbonate (32) resulted in the predominant formation of the O, S-rearrangement product (35) in 53% yield.