Reaction of pyrimidin-2(1H)-ones and -thiones with organometallic compounds. Regioselective preparation of dihydropyrimidin-2(1H)-ones and -thiones
作者:Choji Kashima、Akira Katoh、Yuko Yokota、Yoshimori Omote
DOI:10.1039/p19810000489
日期:——
6-Dimethyl-1-phenylpyrimidin-2(1H)-one (1) reacted with methylmagnesium iodide to afford 4,6,6-trimethyl-1-phenyl-3,6-dihydropyrimidin-2(1H)-one (8a) selectively; compound (1) reacted with methyl-lithium to give mainly 4,4,6-trimethyl-1-phenyl-3,4-dihydropyrimidin-2(1H)-one (8b). The reactions of various pyrimidin-2(1H)-ones and -thiones with organometallic compounds, and the influence of bulkiness
4,6-二甲基-1-苯基嘧啶-2(1 H)-一(1)与甲基碘化镁反应,得到4,6,6-三甲基-1-苯基-3,6-二氢嘧啶-2(1 H)-一(8a)选择性地;化合物(1)与甲基锂反应,主要得到4,4,6-三甲基-1-苯基-3,4-二氢嘧啶-2(1 H)-一(8b)。还讨论了各种嘧啶2-2 (1 H)-酮和-硫酮与有机金属化合物的反应,以及烷基的庞大度对产物比率的影响。