Isolation of Intermediates in the Synthesis of Thieno[2,3-d]pyrimidine-2,4(1H,3H)-diones Using Microwave Irradiation
作者:A. Davoodnia、A. Zare-Bidaki、H. Eshghi
DOI:10.1080/10426500802048573
日期:2008.11.7
the synthesis of 3-arylthieno[2,3-d]pyrimidine-2,4(1H,3H)-diones has been developed by microwave-assisted condensation of ethyl 2-amino-4,5-dimethylthiophene-3-carboxylate with aryl isocyanates. The intermediates, subsequently, underwent cyclization in t-butanol in the presence of potassium t-butoxide on heating to reflux to give the desired bicyclic products, 3-arylthieno[2,3-d]pyrimidine-2,4(1H,3H)-diones
通过微波辅助缩合乙基 2-氨基,开发了一种简单快速的分离合成 3-芳基噻吩并[2,3-d]嘧啶-2,4(1H,3H)-二酮中间体的方法。 4,5-二甲基噻吩-3-羧酸酯与异氰酸芳基酯。随后,中间体在叔丁醇钾的存在下在叔丁醇钾存在下在加热回流下进行环化,得到所需的双环产物,3-芳基噻吩并[2,3-d]嘧啶-2,4(1H,3H) -迪奥内斯。