摘要:
Benzaldehydeazines, p-anisaldehydeazines, and thiophene-2-carboxaldehyde azines react with excess chlorosulfonic acid to give corresponding disulfonyl chlorides 1,13, and 24. These were condensed with nucleophiles to give disulfonyl amino acid derivatives, 2-4, 14-16, and 25-27. Some of the corresponding methyl esters were prepared: 5-6, 17-18, and 28-29. Hydrazinolysis of these methyl esters yielded hydrazides 7-8, 19-20, and 30-31. Coupling reactions of some amino acid derivatives, in THF-Et8N medium using the dicyclohexylcarbodiimide method DCC, furnished dipeptide methyl esters 9-12, 21-23, and 32-34. Attemped chlorosulfonation of furan-2-carboxaldehyde azine were unsuccessful. Some spectra data are briefly discussed.