Rhodium-catalysed synthesis of fused pyrimidine derivatives employing N-sulfonyl-1,2,3-triazoles as a 1-aza-[4C] synthon
作者:Ze-Feng Xu、Yuehui An、Yidian Chen、Shengguo Duan
DOI:10.1016/j.tetlet.2019.06.023
日期:2019.7
A new synthetic application of N-sulfonyl-1,2,3-triazoles acting as a 1-aza-[4C] synthon via the 1,2-shift reaction of an α-imine rhodium carbene was developed for the synthesis of fused pyrimidine derivatives. The high reactivity of the strained three-membered 2H-azirine ring facilitated the unusual cyclization of electron-deficient dienes with electron-deficient dienophiles. The compatibility was
通过α-亚胺铑卡宾的1,2-转移反应,N-磺酰基-1,2,3-三唑类化合物作为1-氮杂-[4C]合成子的一种新的合成应用被开发用于熔融嘧啶的合成衍生品。应变的三元2 H-叠氮基环的高反应性促进了缺电子二烯与缺电子二烯的异常环化。兼容性很好,可以容忍常见功能。观察到优异的化学选择性,并且在卡宾铑和2 H-叠氮基之间未发生反应。产品可以转换为七元多功能1 H-1,4-二氮杂卓衍生物,说明该方案在中型N杂环合成中的潜在应用。