Solid state synthesis of 2-aroylbenzo[b]furans, 1,3-thiazoles and 3-aryl-5,6-dihydroimidazo[2,1-b][1,3]thiazoles from α-tosyloxyketones using microwave irradiation †
作者:Rajender S. Varma、Dalip Kumar、Per J. Liesen
DOI:10.1039/a807563h
日期:——
3]thiazoles are described from readily accessible α-tosyloxyketones and mineral oxides in processes that are accelerated by exposure to microwaves. The 2-aroylbenzo[b]furans are readily obtained from salicylaldehydes and α-tosyloxyketones in the presence of solid potassium fluoride doped alumina (KF–Al2O3) whereas montmorillonite K-10 clay provides 1,3-thiazoles from thioamides and α-tosyloxyketones
2-芳酰基苯并的迅速无溶剂合成[ b ]呋喃,1,3-噻唑和3-芳基-5,6-二氢咪唑并[2,1- b ] [1,3]是从容易获得α-tosyloxyketones描述噻唑类和通过暴露于微波而加速的过程中的矿物氧化物。在固态氟化钾掺杂的氧化铝(KF–Al 2 O 3)存在下,从水杨醛和α-甲苯磺酰氧基酮很容易获得2-芳基苯并[ b ]呋喃,而蒙脱土K-10粘土从硫酰胺和α提供了1,3-噻唑。 -甲苯磺酰氧基酮。同样,亚乙基硫脲和α-甲苯磺酰氧基酮可提供桥头氮杂环,3-芳基-5,6-二氢咪唑并[2,1- b] [1,3]噻唑类,其收率很高,在传统的加热条件下不易获得。