Heterocycles p. 1309 - 1314 (1990)
Update date:2022-08-05
Topics:
Miyashita, Akira
Iijima, Chihoko
Higashino, Takeo
Matsuda, Hideaki
Reaction of 5-amino-1-phenyl-1H-pyrazole-4-carboxamide (4) with the esters (3a-h) in the presence of sodium ethoxide in ethanol gave 1-phenyl-1H-pyrazolo<3,4-d>pyrimidin-4(5H)-one (1a) and its 6-substituted derivatives (1b-h).Similar treatment of 5-amino-1-methyl-1H-pyrazole-4-carboxamide (5) with 3a-h gave the 1-methyl-1H-pyrazolo<3,4-d>pyrimidin-4(5H)-ones (2a-h).
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Doi:10.1021/jo01017a052
(1965)Doi:10.1021/om00162a021
(1990)Doi:10.1016/S0040-4039(01)83885-5
(1965)Doi:10.1016/S0957-4166(00)82337-X
(1993)Doi:10.1016/j.bmcl.2004.03.047
(2004)Doi:10.1021/jo00099a001
(1994)
