[EN] IMPROVED AND EFFICIENT PROCESS FOR THE SYNTHESIS OF 2-[2-(1-CHLOROCYCLOPROPYL)-3-(2-CHLOROPHENYL)-2- HYDROXYPROPYL]-2,4-DIHYDRO-3H-1,2,4-TRIAZOLE-3-THIONE (PROTHIOCONAZOLE) AND ITS INTERMEDIATES [FR] PROCÉDÉ AMÉLIORÉ ET EFFICACE POUR LA SYNTHÈSE DE 2-[2-(1-CHLOROCYCLOPROPYL)-3-(2-CHLOROPHÉNYL)-2- HYDROXYPROPYL]-2,4-DIHYDRO-3H-1,2,4-TRIAZOLE-3-THIONE (PROTHIOCONAZOLE) ET DE SES INTERMÉDIAIRES
Method for producing 2-(1,2,4-Triazol-1-yl)-ethanols
申请人:——
公开号:US20030018201A1
公开(公告)日:2003-01-23
According to a novel process, microbicidally active 2-(1,2,4-triazol-1-yl)-ethanols of the formula
1
in which
A
1
, A
2
, R
1
, R
2
, R
3
and R
4
are as defined in the description, can be prepared by reacting hydrazine derivatives of the formula
2
with N-dihalogenomethyl-formamidinium halide of the formula
3
in which
X represents chlorine or bromine,
if appropriate in the presence of a diluent.