Abstract
AbstractSchiff base dioxomolybdenum(VI) complex is found to be a novel and efficient catalyst for the selective synthesis of 2‐substituted 2,3‐dihydroquinazolin‐4(1H)‐ones via condensation of 2‐aminobenzamide with aldehydes or ketones. Also, this catalyst is also found to be efficient for the construction of quinazolin‐4(3H)‐ones while in the presence of hydrogen peroxide as oxidant. At higher temperature the aldehydes undergo an oxidative cyclization reaction affording the quinazolin‐4(3H)‐ones. Herein we report a novel protocol with practical simplicity, broad substrate scope, good selectivity, moderate to excellent yields, and low catalyst loading (0.5% mol).
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