摘要 |
<p>The present invention relates to a process for the preparation of compounds of formula (I) wherein R 1 and R 2 are each independently of the other hydrogen or C 1 -C 5 alkyl and R 3 is CF 3 or CF 2 H, by a) reaction of a compound of formula (II) wherein R 1 and R 2 are as defined for formula (I), with at least one reducing agent to form a compound of formula (III) wherein R 1 and R 2 are as defined for formula (I), and b) reaction of that compound with at least one reducing agent to form a compound of formula (IV) wherein R 1 and R 2 are as defined for formula (I), and (c) reaction of that compound with a compound of formula (V) wherein Q is chlorine, fluorine, bromine, iodine, hydroxy or C 1 - C 6 alkoxy and R 3 is as defined for formula (I), to form the compound of formula (I); and to novel intermediates for use in that process. No Suitable Figure</p> |
申请人 |
SYNGENTA PARTICIPATIONS AG.;SYNGENTA LIMITED |
发明人 |
TOBLER, HANS;WALTER, HARALD;EHRENFREUND, JOSEF;CORSI, CAMILLA;GIORDANO, FANNY;ZELLER, MARTIN;SEIFERT, GOTTFRIED;SHAH, SHAILESH, C.;GEORGE, NEIL;JONES, IAN;BONNETT, PAUL |