Mt. Migawa et al., A 2-STEP SYNTHESIS OF THE NUCLEOSIDE-Q PRECURSOR 2-AMINO-5-CYANOPYRROLO[2,3-D]PYRIMIDIN-4-ONE (PREQ(0)), Synthetic communications, 26(17), 1996, pp. 3317-3322
PreQ(o) (1) is prepared in a 70 % yield by the condensation of chloro(
formyl)acetonitrile (2) with 2,6-diaminopyrimidin-4-one (3), and subse
quently converted to its amide derivative 5. Isolation of the intermed
iate 4 in the condensation reaction was also observed giving further i
nsight into the proposed mechanism.