1,3,4-Oxadiazolo[3,2-α]pyrimidinium salts
Tóm tắt
5-Amino-1,3,4-oxadiazolium perchlorates react with 1,3-carbonyl-functional compounds to give 1,3,4-oxadiazolo[3,2-α]pyrimidinium perchlorates. The latter are cleaved by both alkali and strong acid to give 1-amino-2-pyrimidinone or 5-amino-1,3,4-oxadiazole derivatives. The l,3,4-oxadiazolo[3,2-α]pyrimidinium perchlorates react with anailine and hydrazines to give sym-triazolo[1,5-α]pyrimidinium salts and with acetylacetone to give pyrazolo[1,5-α]pyrimidines.
Tài liệu tham khảo
V. A. Chuiguk, K. V. Fedotov, Yu. P. Boiko, I. P. Bachkovskii, G. M. Golubushina, and O. M. Mostovaya, Khim. Geterotsikl. Soedin., 1432 (1973).
S. M. Shul'ga and V. A. Chuiguk, Ukr. Khim. Zh., 39, 1151 (1973).
M. Ohtsuru, K. Tori, and H. Watanabe, Chem. Pharm. Bull. (Tokyo), 15, 1015 (1967).
G. V. Boyd and A. J. H. Summers, J. Chem. Soc., C, 409 (1971).
V. E. Pashinnik, G. M. Golubushina, and V. A. Chuiguk, Ukr. Khim. Zh., 39, 1036 (1973).
C. Bulow and K. Haas, Ber., 43, 375 (1910).
R. Stolle, J. prakt. Chem., 122, 289 (1929).
H. Hehlen, Ann., 563, 187 (1949).
H. Hehlen and W. Hildebrandt, East German Patent No. 30881 (1965); Chem. Abstr., 64, P3558 (1966).
M. Kochhar, J. Heterocycl. Chem., 9, 153 (1972).