Radical Allylation, Vinylation, Alkynylation, and Phenylation Reactions of α-Halo Carbonyl Compounds with Organoboron, Organogallium, and Organoindium Reagents
reactions of α-halo carbonyl compounds with alkenylindium proceeded via a radical process in the presence of triethylborane. Unactivated alkene moieties and styryl groups were introduced by this method. The carbon-carbon double bond geometry of the alkenylindiums was retained during the alkenylation. Preparation of an alkenylindium via a hydroindation of 1-alkyne and subsequent radical alkenylation established
Process for preparing dihalovinylcyclopropanecarboxylates
申请人:Sagami Chemical Research Center
公开号:US04214097A1
公开(公告)日:1980-07-22
Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.
Intermediates for insecticidal synthetic pyrethroids
申请人:FMC Corporation
公开号:US04415748A1
公开(公告)日:1983-11-15
Intermediates and Process For Insecticidal Synthetic Pyrethroids Compounds of the formulas ##STR1## and their use in a process for preparing a pyrethroid insecticide of the formula ##STR2## wherein R is a substituted or unsubstituted biphenylmethyl radical or 4-phenyl-2-indanyl radical are disclosed and exemplified.
Novel syntheses of dihalovinylcyclopropanecarboxylates, including potent insecticides, are described. The processes begin with the reaction between an alkenol and an orthoester to produce a .gamma.-unsaturated carboxylate, followed by the catalyzed addition of a carbon tetrahalide to the double bond and dehydrohalogenation to produce a cyclopropane derivative.