Total synthesis of hydroxystrobilurin A via Stille coupling
摘要:
A six-step total synthesis of the fungicidal natural product hydroxystrobilurin A is described, utilising Stille chemistry for efficient access to the strobilurin (E,Z,E)-triene system. (C) 2008 Elsevier Ltd. All rights reserved.
[EN] HERBICIDAL PYRIDAZINONE DERIVATIVES<br/>[FR] DÉRIVÉS HERBICIDES DE PYRIDAZINONE
申请人:SYNGENTA LTD
公开号:WO2013050421A1
公开(公告)日:2013-04-11
The present invention provides a compound of Formula (I) or an agronomically acceptable salt thereof, wherein:R2 is selected from the group consisting of (A1), (A2) and (A3) wherein X1 is N or CR7 X2 is N or CR8 X3 is N or CR9 X4 is N or CR6 R1, R3, R4, R5 R6, R7, R8 and R9 are as defined herein. The invention further relates to herbicidal compositions which comprise a compound of Formula (I), and to their use for controlling weeds, in particular in crops of useful plants.
[EN] MOSQUITO VECTOR CONTROL COMPOSITIONS, METHODS AND PRODUCTS UTILIZING SAME<br/>[FR] COMPOSITIONS DE LUTTE CONTRE LES MOUSTIQUES VECTEURS, MÉTHODES ET PRODUITS L'UTILISANT
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2016193267A1
公开(公告)日:2016-12-08
The present inventions concerns use of a certain methoxyacrylate compound to control mosquitoes, and vector control solutions comprising a defined methoxyacrylate compound, in particular the invention relates to a substrate, to a composition, for controlling mosquitoes comprising a defined methoxyacrylate compound, and to certain methoxyacrylate compounds.
Dehydration-type Ti-Claisen Condensation (Carbonhomologation) of α-Heteroatom-substituted Acetates with Alkyl Formates: Utilization as (<i>Z</i>
)-Stereodefined Cross-coupling Partners and Application to Concise Synthesis of Strobilurin A
homologation (dehydration type Ti-Claisen condensation) of alkyl α-heteroatom (halo and sulfonyloxy)-substituted acetates (XCH2CO2R) with alkyl formates (HCO2R) to afford various alkyl β-alkoxy-α-halo or sulfonyloxy-substituted acrylates (24 examples; 51%–91% yield). Stereoretentive Suzuki-Miyaura, Negishi, and Sonogashira cross-couplings using the obtained methyl β-methoxy-α-halo or sulfonyloxy-substituted