Reference

Synthesis of 8H-1,2,4-triazolo[4,3-a]perimidines

Synthesis of 8H-1,2,4-triazolo[4,3-a]perimidines. Burkhardt, U.; Johne, S. (Inst. Biochem. Pflanz., Dtsch. Akad. Wiss., Halle/Saale DDR-4020, Ger. Dem. Rep.). 115-80-0 which is the cas registry number is also used here. J. Prakt. Chem., 328(2), 237-44 (German) 1986. CODEN: JPCEAO. ISSN: 0021-8383. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Condensation of hydrazinoperimidine I with RCO2H (R = H, Me, Et, C11H23, C13H27, C15H31, C17H35) or R1C(OEt)3 (R1 = H, Me, Et, Ph) gave triazoloperimidines II (R2 = R, R1). II (R2 = Me, Et, Ph) were also prepd. by condensation of I with R3CHO (R3 = Me, Et, Ph) followed by air-oxidn. of the intermediate alkylidenehydrazinoperimidine III. .

Pyridazine chemistry

Pyridazine chemistry. XXIX. Synthesis of pyrimido[4,5-d]pyridazines from 5-amino-4-pyridazinyl aryl ketones. Haider, Norbert; Heinisch, Gottfried (Inst. Pharm. Chem., Univ. Wien, Vienna A-1090, Austria). Arch. Pharm. (Weinheim, Ger.), 319(9), 850-5 (German) 1986. CODEN: ARPMAS. 122-51-0 which is the cas registry number of some chemical is mentioned. ISSN: 0365-6233. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) The pyrimidopyridazinones I (R = H, Me) were prepd. by treating the benzoylpyridazinamines II with H2NCO2Et. The pyrimidopyridazines III (R1 = H, Me, Et) were prepd. by treating II (R = H) with R1C(OEt)3 followed by NH3. .