Synthesis of 3-Aryl-3,4-Dihydroquinazolin-2(1H)-Ones with the Aid of Low-Valent Titanium Reagent (TiCl<sub>4</sub>-Sm)
作者:Daqing Shi、Guolan Dou、Zheng-Yi Li
DOI:10.3184/030823407x248306
日期:2007.9
A short and facile synthesis of a series of 3-aryl-3,4-dihydroquinazolin-2(1H)-ones was accomplished in good yields via the novel reductive cyclisation of 2-nitrobenzylamines with bis(trichloromethyl)carbonate (triphosgene) promoted by TiCl4/Sm system. The structures of the products were characterised by IR, 1H NMR and elemental analysis and the structure of 3a was confirmed by X-ray diffraction analysis