反应详情

The title compound was prepared from 2-bromopyridine and 5-(5-bromo-2-ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one, following the procedure described in Example 32, and was obtained as an off-white solid (33%), m.p. 216°-218° C. Found: C,67.71; H,5.81; N,17.63. C22H23N5O2 requires C,67.85; H,5.95; N,17.98%.