Reduction of alpha-bromosulfones 1, 5, 13-16 by cat.(PhSe)(2)/NaBH4 occurred site-selectively in high yields. This reduction of 1,3- or 1,4-dibromobis(sulfone) 21 and 25 was applied to intramolecular coupling reactions to give the three- and four-membered carbocycles 26-28. (C) 1997 Elsevier Science Ltd.
Chemoselective mono halogenation of β-keto-sulfones using potassium halide and hydrogen peroxide; synthesis of halomethyl sulfones and dihalomethyl sulfones
摘要:
The synthesis of alpha-halo beta-keto-sulfones using potassium halide and hydrogen peroxide as a chemoselective mono halogenation reagent and the synthesis of alpha, alpha-symmetrical and asymmetrical dihalo beta-keto-sulfones and alpha-halo, alpha-alkyl and beta-keto-sulfones is described. Base induced cleavage of alpha-halo beta-keto-sulfones, alpha,alpha-dihalo beta-keto-sulfones, and alpha-halo, alpha-alkyl beta-keto-sulfones afforded the corresponding halomethyl sulfones, dihalomethyl sulfones and haloalkyl sulfones. (c) 2006 Elsevier Ltd. All rights reserved.
The present invention relates to novel 2,4,6-phenyl-substituted cyclic ketoenols of the formula (I)
in which W, X, Y and CKE have the meanings given in the disclosure, to a plurality of processes for their preparation and to their use as pesticides and/or herbicides. The invention further relates to selectively herbicidal compositions containing 2,4,6-phenyl-substituted cyclic ketoenols and a compound which improves crop plant tolerance.
Selective Insecticides and/or Acaricides Based on Substituted Cyclic Dicarbonyl Compounds and Safeners
申请人:Fischer Reiner
公开号:US20080200499A1
公开(公告)日:2008-08-21
The present invention relates to the use of selective insecticidal and/or acaricidal compositions, characterized in that they comprise an effective amount of an active compound combination comprising
(a) at least one substituted cyclic dicarbonyl compound of the formula (I)
in which W, X, Y and Z are as defined in the description and CDC is one of the dicarbonyl radicals mentioned in the description,
and
(b) at least one crop plant compatibility-improving compound from the group of compounds given in the description.
for controlling insects and/or arachnids, and also to a method for controlling insects and/or arachnids using the compositions.