A compound ##STR1## where R' is hydrogen or lower alkyl, the compound being usable as an intermediate in the preparation of 4-hydroxypyrazolo [3,4-d]pyrimidine (Allopurinol) and its useful relatives. A method of preparing ##STR2## which comprises reacting R'C(OR).sub.3, morpholine and cyanoacetamide where R' is hydrogen or lower alkyl and R' is lower alkyl.
一种化合物##STR1##其中R'是氢或较低的烷基,该化合物可用作制备
4-羟基吡唑[3,4-d]
嘧啶(丁
戊酸)及其有用的衍
生物的中间体。一种制备##STR2##的方法,包括反应R'C(OR).sub.3、吗啉和
氰乙酰胺,其中R'是氢或较低的烷基,R'是较低的烷基。