申请人:Ducry Laurent
公开号:US20080119651A1
公开(公告)日:2008-05-22
Pyrimidine-5-carboxylates of formula:
wherein R is C
1-4
alkyl, R
1
is C
1-4
alkyl, trifluoromethyl, R
2
is hydrogen or C
1-4
alkyl and X is hydroxy, chlorine or bromine, are prepared from certain 3-oxoalkanoates of formula (II):
with urea and orthoesters of formula (III) R
2
C(OR). The intermediate 2-acyl-3-ureidoacrylate, without being isolated, is reacted to give a 2-hydroxypyrimidine-5-carboxylate[(I), X═OH] or a hydrate thereof, which is optionally converted into the corresponding chloro or bromo compound (I, X═Cl, Br).