... Volume: Page: ... The general synthetic sequence for the 2,4-disubstituted pyrimidines is shown in Scheme 1. 2,4-Dichloropyrimidines 6 were reacted with ... a Reagents and conditions: (a)CH 3 CN, NaH, dioxane; (b)H 2 NNH 2 ; (c) R 9 OH, DIAD, PPH 3 , CH 2 Cl 2 ...