Synthesis and 1,3-dipolar cycloaddition reactions of<i>N</i>-Aryl-<i>C, C</i>-dimethoxycarbonylnitrones
作者:Yukihiko Tomioka、Chie Nagahiro、Yumiko Nomura、Hiroshi Maruoka
DOI:10.1002/jhet.5570400116
日期:2003.1
bromomalonate to give the corresponding N-aryl-C,C-dimethoxycarbonylnitrones (4–6). Treatment of C,C-dimethoxycarbonyl-N-( 1-naphthyl)nitrone (4) with acetylene compounds (dimethyl acetylenedicarboxylate, methyl 2-butynoate or ethyl phenylpropiolate) caused 1,3-dipolar cycloaddition to furnish the corresponding 1H-benz[g]indolines (7a-c). In a similar manner, the reactions of nitrones 5 and 6 with acetylene compounds
芳基亚硝基化合物1-3容易与溴代丙二酸二甲酯反应,生成相应的N-芳基-C,C-二甲氧基羰基亚硝基(4-6)。用乙炔化合物(乙炔二羧酸二甲酯,2-丁酸甲酯或苯丙丙酸乙酯)处理C,C-二甲氧基羰基-N-(1-萘基)硝基(4)导致1,3-偶极环加成反应提供相应的1 H-苯[ g ]二氢吲哚(7a-c)。以类似的方式,硝酮5和6与乙炔化合物的反应得到相应的二氢吲哚9a-c和11a-c与4-恶唑啉13a-c和14a-c一起。