摘要 : A short and facile synthesis of a series of 1,2-dihydroquiazolin-4(3H)-ones was accomplished in good yields via the novel reductive cyclisation of o-nitrobenzamides with aldehydes or ketones promoted by the TiCl4/Sm system. Struct... 展开 A short and facile synthesis of a series of 1,2-dihydroquiazolin-4(3H)-ones was accomplished in good yields via the novel reductive cyclisation of o-nitrobenzamides with aldehydes or ketones promoted by the TiCl4/Sm system. Structures were established on the basis of elemental analysis, IR, H-1 NMR and confirmed by a single-crystal X-ray diffraction analysis. The advantages of our method are easily accessible starting materials, convenient manipulation and moderate to high yields. [References: 19] 收起