Syntheses of heterocyclic compounds. Part XVIII. Aminolysis of 3-aryl-4-bromosydnones, and acid hydrolysis of 3-arylsydnoneimines
作者:G. S. Puranik、H. Suschitzky
DOI:10.1039/j39670001006
日期:——
various 3-aryl- and 3-heteroaryl-4-bromosydnones with piperidine gives the corresponding piperidino-glycyl-piperidines. Fluorine labelling has confirmed the postulated course of fission induced by acids in 3-aryl-sydnoneimines.
The Efficient Synthesis of 3-Arylsydnones Under Neutral Conditions
作者:Jacqueline Applegate、Kenneth Turnbull
DOI:10.1055/s-1988-27791
日期:——
Various substituted aryl sydnones can be prepared in high yield under mild, neutral conditions by nitrosation of the appropriate aryl glycine with isoamyl nitrite in dimethoxyethane followed by cyclization with trifluoroacetic anhydride.
Reactions of anilines with ethyl bromoacetate under microwave irradiation have afforded N-arylglycines that are subsequently converted to their N-nitroso derivatives with a combination of silica chloride or periodic acid, wet SiO2 and sodium nitrite in CH2Cl2 with satisfactory yields. In the final step, the use of 1,3-dibromo-5,5-dimethylhydantoin (DBH) as a new and effective reagent for dehydration of N-nitroso-N-arylglycines to sydnones was successfully examined.
Mallur, Shanta G.; Tiwari; Raju, B. China, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 10, p. 1686 - 1689
作者:Mallur, Shanta G.、Tiwari、Raju, B. China、Babu, K. Suresh、Ali, A. Zehra、Sastry、Rao, J. Madhusudana
DOI:——
日期:——
118. The sydnones. A new class of compound containing two adjacent nitrogen atoms