A range of 2,3-dihydroquinazolin-4(1)-ones and their 1-substituted analogues have been selectively prepared mostly in moderate to excellent yields through Pd(II)-catalyzed one-pot annulation of -aminobenzoic acids with CO, ammonium acetate and aldehydes. This protocol features with simple raw materials and operation, low catalyst loading and cost, high step economy & efficiency, good product diversity
通过 Pd(II) 催化 β-
氨基
苯甲酸与 CO、
铵的一锅成环反应,选择性地制备了一系列 2,3-二氢
喹唑啉-4(1)-酮及其 1-取代类似物,大部分产率中等至优异
乙酸酯和
醛类。该方案原料和操作简单,催化剂用量和成本低,步骤经济性和效率高,产品多样性好,适用性广泛。