Straightforward Novel One-Pot Enaminone and Pyrimidine Syntheses by Coupling-Addition-Cyclocondensation Sequences
作者:Thomas J. Müller、Alexei S. Karpov
DOI:10.1055/s-2003-42480
日期:——
The coupling of acid chlorides 1 with terminal alkynes 2 using only one equivalent (!) of triethylamine under Sonogashira conditions followed by subsequent addition of primary or secondary amines 4 to the intermediate alkynones 3 represents a straightforward one-pot three component access to enaminones 5 under mild conditions and in excellent yields. Furthermore, 2,4-di- and 2,4,6-trisubstituted pyrimidines
在 Sonogashira 条件下,酰氯 1 与末端炔烃 2 的偶联仅使用一当量 (!) 三乙胺,随后将伯胺或仲胺 4 添加到中间体炔酮 3 中,代表了一种直接的一锅三组分获得烯胺酮 5条件温和,产量高。此外,2,4-二和2,4,6-三取代的嘧啶7可以根据高度灵活的偶联-加成-环缩合序列以中等至良好的产率合成。