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The 1,3-Dipolar Cycloadditions of 3-Arylsydnone-4-Carbonitrile Oxides with Nitriles |
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| Authors: | Mou-Yung Yeh I-Horng Pan Che-Ping Chuang Hsien-Ju Tien |
| Abstract: | 3-Arylsydnone-4-carbonitrile oxides (2), which are generated in situ by thermal dehydrochlorination of the corresponding hydroximic acid chlorides (1), undergo 1,3-dipolar cycloadditions with sydnone-4-carbonitriles (6) to give 3-aryl-4-[5-(3-arylsydnonyl)-1,2, 4-oxadiazol-3-yl] sydnones (9). These nitrile oxides (2) also react with alkyl- and arylnitriles to give 1,3-dipolar cycloaddition products. |
| Keywords: | 1,3-Dipolar cycloaddition thermal dehydrochlorination 3-arylsydnone-4-carbonitrile oxides 3-arylsydnone-4-carbohydroximic acid chlorides 3-aryl-4-[5-(3-arylsydnonyl)-1,2,4-oxadiazol-3-yl] sydnones 3-arylsydnone-4-carbonitriles 3-aryl-4-(5-aryl-1,2,4-oxadiazol-3-yl)sydnones |