公开(公告)号：AU682257B2

公开(公告)日：1997-09-25

申请号：AU1777895

申请日：1995-05-01

Applicant: BASF AG

Inventor： KONIG HARTMANN ,  GOTZ NORBERT ,  KIRSTGEN REINHRD ,  MULLER BERND ,  OBERDORF KLAUS

IPC: C07D231/18 ,  C07D231/22 ,  C07D401/04 ,  C07D403/04

Abstract: The prepn. of 1-(Hetero)aryl-3-hydroxy-pyrazoles of formula (I) comprises mixing propiolic acid esters of formula R1C IDENTICAL CCOOR' (II) with (hetero)arylhydrazine derivs. of formula RNHNH2 (III) in an inert solvent; and then treating with a base at 0-60 degrees C. R = opt. substd. aromatic or heteroaromatic; n = 0, 1 or 2; R1 = a gp. which is stable under the reaction conditions; R' = alkyl, cycloalkyl or aryl.

公开(公告)号：AU1777895A

公开(公告)日：1995-11-09

申请号：AU1777895

申请日：1995-05-01

Applicant: BASF AG

Inventor： KONIG HARTMANN ,  GOTZ NORBERT ,  KIRSTGEN REINHRD ,  MULLER BERND ,  OBERDORF KLAUS

IPC: C07D231/18 ,  C07D231/22 ,  C07D401/04 ,  C07D403/04

Abstract: The prepn. of 1-(Hetero)aryl-3-hydroxy-pyrazoles of formula (I) comprises mixing propiolic acid esters of formula R1C IDENTICAL CCOOR' (II) with (hetero)arylhydrazine derivs. of formula RNHNH2 (III) in an inert solvent; and then treating with a base at 0-60 degrees C. R = opt. substd. aromatic or heteroaromatic; n = 0, 1 or 2; R1 = a gp. which is stable under the reaction conditions; R' = alkyl, cycloalkyl or aryl.