An efficient, multicomponent, green protocol to access 4, 7-dihydrotetrazolo [1, 5-<i>a</i>] pyrimidines and 5,6,7,9-tetrahydrotetrazolo[5,1-<i>b</i>]quinazolin-8(4H)-ones using PEG-400 under microwave irradiation
作者:Shaik Firoj Basha、Tangella Nagendra Prasad、Veera Babu Gudise、Vadiga Shanthi Kumar、Naveen Mulakayala、Shaik Anwar
DOI:10.1080/00397911.2019.1659973
日期:2019.11.17
carry out the synthesis of different dihydrotetrazolo[1,5-a]pyrimidines and tetrahydrotetrazolo[1,5-a]quinazolinones. This method has the advantage of green protocol, operational simplicity, high yields, recyclability of the solvent and involves isolation of the final product without column purification. The scope of this reaction tolerates with aromatic, heteroaromatic and alicyclic aldehydes. Graphical
摘要 5-甲基-4,7-二氢四唑并[1,5-a]嘧啶、5-叔丁基-4,7-二氢四唑并[1,5-a]嘧啶、6,6 -二甲基-5,6,7,9-四氢四唑并[5,1-b]喹唑啉-8(4H)-one和5,6,7,9-四氢四唑并[5,1-b]喹唑啉-8(4H) -一种衍生物是通过醛、5-氨基四唑和二酮在 PEG-400 中在微波照射下在 110°C 下进行 30 分钟的三组分反应来描述的。广泛的二酮如乙酰乙酸乙酯、乙酰乙酸叔丁酯、5,5-二甲基环己烷-1,3-二酮和1,3-环己二酮用于合成不同的二氢四唑并[1,5-a]嘧啶和四氢四唑并[1,5-a]喹唑啉酮。该方法具有协议绿色、操作简单、产量高、溶剂的可回收性,包括无需柱纯化即可分离最终产品。该反应适用于芳香族、杂芳香族和脂环族醛。图形概要