Efficient and divergent one-pot synthesis of cyclopropyl amides and esters from readily available 1-acetylcyclopropanes via iodoform reaction based on the selection of reaction conditions is reported. A series of substituted cyclopropyl amides were synthesized from 1-acetylcyclopropanes, iodine, and ammonia in water in the presence of K2CO3 in good yields, whereas substituted cyclopropyl esters were
据报道,基于反应条件的选择,通过碘仿反应从易得的1-乙酰基环丙烷通过一锅法高效,多样地合成了环丙基酰胺和酯。在K 2 CO 3存在下,由1-乙酰基环丙烷,碘和氨在水中以高收率合成了一系列取代的环丙基酰胺,而由1-乙酰基环丙烷与碘和醇在乙醇中的反应制得了取代的环丙基酯。 DBU的存在。 环丙烷-碘仿反应-碘-酰胺-水
Synthesis of polysubstituted 3H-pyrimidin-4-ones from cyanoacetamides under Vilsmeier conditions
作者:Zhiguo Zhang、Can Xue、Xiao Liu、Qian Zhang、Qun Liu
DOI:10.1016/j.tet.2011.07.006
日期:2011.9
A facile and efficient approach to a variety of 6-chloro-3,5-disubstituted 3H-pyrimidin-4-ones 2/6 from the readily available cyanoacetamides 1/5 under Vilsmeier conditions was developed, in which the Vilsmeier reagent plays multiple roles and the possible mechanism is discussed. (C) 2011 Elsevier Ltd. All rights reserved.