Various 4 - acetyl sydnones (2) can be prepared by reaction of the corresponding 3-aryl sydnones (1) with aceticanhydride at ∼110 °C promoted by N-Bromosuccinimide (NBS) as an effective reagent for acylation of sydnones underneutralconditions in satisfactory yields.
1,3-Dibromo-5,5-dimethylhydantoin (DBH) as an efficient promoter for acetylation of 3-arylsydnones in the presence of acetic anhydride under neutral conditions
1,3-Dibromo-5,5-dimethylhydantoin (DBH) has been found to efficiently promote the conversion of various 3-arylsydnones to their 4-acetyl congeners in the presence of aceticanhydrideunderneutralconditions in satisfactory yields.
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:——
Tien, Hsien-Ju; Lin, Shaw-Tao; Ong, Geok Toh, Journal of the Chinese Chemical Society, 1994, vol. 41, # 6, p. 813 - 816
作者:Tien, Hsien-Ju、Lin, Shaw-Tao、Ong, Geok Toh
DOI:——
日期:——
Pyridine-catalyzed synthesis of quinoxalines as anticancer and anti-tubercular agents
作者:Atulkumar A. Kamble、Ravindra R. Kamble、Mahadev N. Kumbar、Gireesh Tegginamath
DOI:10.1007/s00044-016-1558-2
日期:2016.6
Quinoxaline derivatized with coumarin viz., 3a–f and with sydnones viz., 7a–0 were synthesized using pyridine as catalyst. Among the coumarin derivatives, 3a and 3b have been screened for anticancer activity against 60 human cancer cell lines at NIH (USA). Compound 3a has shown 55.75 % GI against Melanoma (MALME-M) tumor cell line. Further, the sydnone derivatives 7d–i inhibited the Mycobacterium tuberculae