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
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