NOVEL UTILIZATION OF ORGANOSELENIUM COMPOUNDS. I. A FACILE TRANSFORMATION OF FUSED ISOSELENAZOLES TO FUSED PYRIDINES
キーワード:
pyrazolo [4, 3-b] pyridine
1985 年 33 巻 7 号 p. 3065-3067
詳細
1985 年 33 巻 7 号 p. 3065-3067
A facile transformation of 7-oxo-6-phenyl-6H-isoselenazolo [4, 3-d]-pyrimidine (2) or 4, 5-dihydro-4-methyl-6-oxo-5-phenyl-6H-pyrazolo [4, 3-c]-isoselenazole (5) into pyrido [3, 2-d] pyrimidines (3a-f) or pyrazolo [4, 3-b] pyridines (6a-f) was carried out by reactions using active methylene compounds such as malononitrile, ethyl cyanoacetate, ethyl acetoacetate, ethyl malonate, and cyanoacetamide in the presence of a catalytic amount of sodium ethoxide in ethanol.
