Synthesis and reactions of tetrazolo[1,5-α]pyrimidines
作者:Thomas Kappe、Peter Roschger、Gerald Färber
DOI:10.1002/jhet.5570300516
日期:1993.10
The reaction of “magic malonates” (bis-2,4,6-trichlorophenyl malonates, 1) with 5-aminotetrazole (2) in the presence of triethylamine yields the ammonium salts 3. Upon treatment of 3 with strong acids compounds 4a-d were obtained as a mixture of isomeric tetrazolopyrimidines (A) and 2-azidopyrimidines (B). Reaction of 4d with bromine or sulfuryl chloride leads by ring opening and decarboxylation to