Synthesis and some reactions of 6-(2-hydroxyphenyl)-2-thiouracils.
作者:HIKARI MORITA、MASAAKI TANAKA、KANAME TAKAGI
DOI:10.1248/cpb.31.3728
日期:——
6-(2-Hydroxyphenyl)-2-thiouracil (2a) and its 5-chloro and 5-bromo derivatives (2b, c) were synthesized by the reactions of 4-methoxycoumarin (1a) and 3-chloro- and 3-bromo-4-methoxycoumarins (1b, c), respectively, with thiourea in the presence of sodium ethoxide. In these reactions, compound 1c gave not only the pyrimidine 2c, but also the Perkin rearrangement product : N-(3-ethoxybenzofuran-2-carbonyl)thiourea (3). 2-Thiouracils 2a-c were converted to the uracil derivatives (6a, b). Reactions of 2a-c with some cyclic amines and the methylation of 2b, c with methyl iodide were also examined.
通过4-甲氧基香豆素(1a)与3-氯和3-溴反应合成6-(2-羟基苯基)-2-硫尿嘧啶(2a)及其5-氯和5-溴衍生物(2b,c) -4-甲氧基香豆素 (1b, c),分别与硫脲在乙醇钠存在下反应。在这些反应中,化合物1c不仅得到嘧啶2c,还得到Perkin重排产物:N-(3-乙氧基苯并呋喃-2-羰基)硫脲(3)。 2-硫尿嘧啶2a-c被转化为尿嘧啶衍生物(6a,b)。还检测了2a-c与一些环胺的反应以及2b、c与碘甲烷的甲基化。