Carboxamide oximes as convenient precursors for the synthesis of pyrimidine N-oxides
作者:Biserka Mlakar、Bogdan Štefane、Marijan Kočevar、Slovenko Polanc
DOI:10.1016/s0040-4020(98)00152-5
日期:1998.4
A general method for the synthesis of pyrimidine N-oxides from the appropriate carboxamide oximes is described. The conversion involves a treatment of various carboxamide oximes with either 1,1,3,3-tetramethoxypropane, 2,4-pentanedione, 3-ethoxy-2-propenal, 4,4-dimethoxy-2-butanone or 4-methoxy-3-butene-2-one in the presence of trifluoroacetic acid as a catalyst. The application of an unsymmetrical
描述了由合适的羧酰胺肟合成嘧啶N-氧化物的一般方法。该转化涉及用1,1,3,3-四甲氧基丙烷,2,4-戊二酮,3-乙氧基-2-丙烯醛,4,4-二甲氧基-2-丁酮或4-甲氧基-3处理各种羧酰胺肟。 -丁烯-2-酮在三氟乙酸的存在下作为催化剂。不对称二羰基化合物的应用只能产生一种产物。我们的方法是制备吡啶基嘧啶N-氧化物的选择方法。