VERFAHREN ZUR EXTRAKTIVEN ABTRENNUNG VON 2-ALKYLTHIO-5-PHENYLPYRIMIDINEN AUS IHREN REAKTIONSGEMISCHEN

摘要

Disclosed is a method for the separation by multi-stage extraction of 2-alkylthio-5-phenylpyrimidines of general formula (I) in which R<1> is H or an alkyl group with 1 to 15 C-atoms, X is an oxygen atom or a single bond and R<2> is an alkyl with 1 to 15 C-atoms, using two organic solvents which give two immiscible phases. The method has the advantage that the phenylpyrimidines are obtained from the reaction mixture at a high level of purity even on a commercial scale.