Thienyl-pyrazoles and their use for controlling pests
申请人:Nihon Bayer Agrochem K.K.
公开号:US06593358B1
公开(公告)日:2003-07-15
The present invention relates to compounds of the formulae (Ia) and (Ib)
wherein
R1 represents C1-10 alkyl which may be unsubstituted or substituted with halogen, or represents C2-4 alkoxyalkyl, C2-4 hydroxyalkyl, C3-6 cycloalkyl, hydroxy, C1-9 alkoxy which may be unsubstituted or substituted with halogen, or represents C3-6 cycloalkoxy, C2-4 alkoxyalkoxy or C3-4 alkynyloxy, and
R2 represents hydrogen, C1-4 alkoxycarbonyl, C1-3 alkylcarbonyl or C2-4 alkoxyalkyl,
to processes for their preparation and to their use for controlling animal pests.
Synthesis of 3-substituted and 3,4-disubstituted pyrazolin-5-ones
作者:Jae-Chul Jung、E.Blake Watkins、Mitchell A Avery
DOI:10.1016/s0040-4020(02)00306-x
日期:2002.4
The synthesis of 3-substituted and 3,4-disubstituted pyrazolin-5-ones from acylated ethyl acetoacetates and diethyl malonates is described. The reaction of acylated ethyl acetoacetates and diethyl acetylmalonate with hydrazine (98%) gave 3-substituted-pyrazolin-5-ones and malonyidihydrazide, respectively, following a deacetylation-condensation sequence. The reaction of ethyl 2-acetyl-3-hydroxy-2-butenoate and diethyl 2-(1-hydroxyethylidene)malonate with hydrazine monohydrochloride yielded ethyl 3,5-dimethyl-1H-pyrazole-4-carboxylate and 4-ethoxycarbonyl-3-methylpyrazolin-5-one, respectively, following a dehydration-cyclocondensation sequence, in high yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
THIENYL-PYRAZOLES AND THEIR USE FOR CONTROLLING PESTS