Dichotomies in microwave-assisted propargyl-isomerization–Claisen domino sequences dependent on base strengths
作者:Daniel M. D'Souza、Wei-Wei Liao、Frank Rominger、Thomas J. J. Müller
DOI:10.1039/b714351f
日期:——
Microwave-assisted unimolecular isomerizationâClaisen domino reactions of 1,3-di(hetero)aryl propargyl trityl ethers lead, depending on the basicity of the amine, either to the formation of tricyclo[3.2.1.02,7]oct-3-enes (with triethylamine) or to indanes (with DBU). Based upon product analyses and computations, this base dependent dichotomy can be rationalized as a sequel of pericyclic reactions with intermediate protonation and deprotonation.
微波辅助单分子异构化——1,3-二(杂)芳基丙炔三苯基醚的克莱森多米诺反应,根据胺的碱性,要么形成三环[3.2.1.02,7]辛-3-烯(与三乙胺反应),要么形成茚(与二丁基茚反应)。根据产品分析和计算,这种碱依赖性二分法可以合理地解释为具有中间质子化和去质子化的周期性反应的后续反应。