Synthesis of a Novel Series of 2,3-Disubstituted Quinazolin-4(3H)-ones as a Product of a Nucleophilic Attack at C(2) of the Corresponding 4H-3,1-Benzoxazin-4-one
作者:Mahr A. El-Hashash、Yaser A. El-Badry
DOI:10.1002/hlca.201000230
日期:2011.3
A new series of 2,3‐disubstituted quinazolin‐4(3H)‐one derivatives was synthesized by nucleophilic attack at C(2) of the corresponding key starting material 2‐propyl‐4H‐3,1‐benzoxazin‐4‐one (Scheme 2). The reaction proceeded via amidinium salt formation (Scheme 3) rather than via an N‐acylanthranilimide. The structure of the prepared compounds were elucidated by physical and spectral data like FT‐IR
通过亲核攻击相应关键起始原料2-丙基-4 H -3,1-苯并恶嗪-4-的C(2)合成了一系列新的2,3-二取代的喹唑啉-4(3 H)-one衍生物。一(方案2)。进行该反应经由脒鎓盐的形成(方案3),而不是通过一个Ñ -acylanthranilimide。FT-IR,1 H-NMR和质谱等物理和光谱数据阐明了所制备化合物的结构。