Ester compound, active agent for controlling noxious insect pests
申请人:Sumitomo Chemical Company, Limited
公开号:US05550258A1
公开(公告)日:1996-08-27
The present invention provides an ester compound represented by a formula I: ##STR1## wherein R.sub.1 denotes a hydrogen atom or a methyl group; R.sub.2 represents a 1-methyl-2-propenyl group, a 1-methyl-2-propynyl group, a 3,3-dihalogeno-1-methyl-2-propenyl group, or a C.sub.1 -C.sub.1 6 alkyl group which may be substituted with at least one halogen atom; and R.sub.3 represents an acid residue of pyrethroids. The invention also relates to an active agent for controlling noxious insect pests containing the ester compound as an active ingredient, an intermediate for production of the ester compound and a process for producing the intermediate. The ester compound represented by the formula I has good activities for controlling noxious insect pests.
reactivity of “furan-ynes” in combination with pyridine and quinoline N-oxides in the presence of a Au(I) catalyst, has been studied, enabling the synthesis of three different heterocyclic scaffolds. Selective access to two out of the three possible products, a dihydropyridinone and a furan enone, has been achieved through the fine-tuning of the reaction conditions. The reactions proceed smoothly at room
polysubstituted furans were synthesized from furan derivatives involving copper-catalyzed ringopening of the furanring. This synthetic method possesses the advantages of readily available starting materials, mild reaction conditions, and short steps. A range of polysubstituted furans were synthesized from furan derivatives involving copper-catalyzed ringopening of the furanring. This synthetic
A class of polysubstituted functionalized furans was synthesized efficiently starting from readily available furans involving the oxidative ringopening of the furanrings using NBS as an oxidant. The reaction proceeded through a sequence of oxidative dearomatization of the furanring/spirocyclization/aromatization.
Di- and triheteroarylalkanes via self-condensation and intramolecular Friedel–Crafts type reaction of heteroaryl alcohols
作者:Seema Dhiman、S. S. V. Ramasastry
DOI:10.1039/c3ob41945b
日期:——
diheteroarylmethanes and 1,3-diheteroarylpropenes has been developed via Yb(III)-catalyzed sequential self-condensation of 2-furfuryl (or 2-thienyl or 3-indolyl) alcohols followed by intramolecular Friedel–Craftstypereaction and elimination of an aldehyde. This method offers a powerful entry and a potential alternative to the traditional synthesis of diheteroarylalkanes, which are precursors to the synthesis