作者:Abraham Langlet、Nikolaj V. Latypov、Ulf Wellmar、Patrick Goede、Jan Bergman
DOI:10.1016/s0040-4039(00)00086-1
日期:2000.3
Nitration of barbituric acid at 40°C gave the previously unknown 5,5-dinitrobarbituric acid (3), which readily underwent hydrolysis to dinitroacetylurea (5), which in turn could be hydrolysed in basic media to the potassium salt of dinitromethane. Alloxane was prepared in a one step procedure by thermal decomposition of 5,5-dinitrobarbituric acid in hot acetic acid.
将巴比妥酸在40°C硝化,得到了以前未知的5,5-二硝基巴比妥酸(3),它很容易水解为二硝基乙酰脲(5),而后者又可以在碱性介质中水解成二硝基甲烷的钾盐。一步法通过在热乙酸中热分解5,5-二硝基巴比妥酸来制备四氧六环。