METHOD OF PREPARATION FOR 2-AMINO-4,6-DICHLOROPYRIMIDINE AND 2-AMINO-4,6-DIMETHOXY-PYRIMIDINE

摘要

PROBLEM TO BE SOLVED: To provide a method simply preparing 2-amino-4,6-dichloropyrimidine low in load to the environment and a method preparing the 2-amino-4,6- dimethoxy-pyrimidine by using obtained 2-amino-4,6-dichloropyrimidine.;SOLUTION: This method of preparing 2-amino-4,6-dichloropyrimidine chlorinates 2-amino-4,6-dihydroxypyrimidine by using phosphorus oxychloride, a higher fatty amine or a fatty diamine as an acid scavenger. This reaction system is in a state of good slurry, simple in operation and low in environmental loading. The method of prepares the 2-amino-4,6-dimethoxy-pyrimidine by methoxylation of the 2-amino-4,6-dichloropyrimidine.;COPYRIGHT: (C)2002,JPO