The mildoxidation of sydnone-benzoylhydrazonehybrids with leadoxide in acetic acid/dichloromethane solution inducted their intramolecular cyclization to provide the corresponding 2,5-disubstituted-1,3,4-oxidiazole derivatives. The sydnone moiety has been efficient preserved for the future work in the mildoxidation. J. Heterocyclic Chem., (2009).
Reactions of 4-Acetylsydnones with Hydrazine: Formation of 2,4-Dihydropyrol-3-ones
作者:Shaw-Tao Lin、Hsien-Ju Tien、Mei-Lin Yang
DOI:10.3987/com-98-8355
日期:——
Reactions of 4-Hydrazinocarbonylmethylene 3-Arylsydnones and 3-(4-Hydrazinocarbonylphenyl)sydnones
作者:Shaw-Tao Lin、Mein-Lin Yang、Hsien-Ju Tien
DOI:10.1002/jccs.199900008
日期:1999.2
AbstractThe phenyl ring of 3‐(4‐hydrazinocarbonylphenyl)sydnone activates a hydrazinocarbonyl group to undergo a series of reactions for preparing heterocyclic compounds including oxadiazoles, dihydropyrroles, and pyrroles. However, the hydrazinocarbonyl group on the C(4)‐CH2 resists a cyclization under the same reaction conditions.