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