[EN] SPIROINDOLINEPIPERIDINE DERIVATIVES<br/>[FR] DERIVES DE SPIROINDOLINEPIPERIDINE
申请人:SYNGENTA LTD
公开号:WO2003106457A1
公开(公告)日:2003-12-24
Insecticidal, acaricidal, nematicidal or molluscicidal compounds of formula (I) wherein Y is a single bond, C=O, C=S or C=(O)q where q is 0, 1 or 2; and R1, R2, R3, R4, R8, R9 and R10 are as defined in the claims or salts or N-oxides thereof, processes for preparing them and compositions containing them.
P[N(<i>i-</i>Bu)CH<sub>2</sub>CH<sub>2</sub>]<sub>3</sub>N: Nonionic Lewis Base for Promoting the Room-Temperature Synthesis of α,β-Unsaturated Esters, Fluorides, Ketones, and Nitriles Using Wadsworth−Emmons Phosphonates
作者:Venkat Reddy Chintareddy、Arkady Ellern、John G. Verkade
DOI:10.1021/jo1012515
日期:2010.11.5
serves as an effective promoter for the room-temperature stereoselective synthesis of α,β-unsaturated esters, fluorides, and nitriles from a wide array of aromatic, aliphatic, heterocyclic, and cyclic aldehydes and ketones, using a range of Wadsworth−Emmons (WE) phosphonates. Among the analogues of 1c [R = Me (1a), i-Pr (1b), Bn (1d)], 1a and 1b performed well, although longer reaction times were involved
A Facile and Mild Approach for Stereoselective Synthesis of α-Fluoro-α,β-unsaturated Esters from α-Fluoro-β-keto Esters via Deacylation
作者:Wenbin Yi、Jinlong Qian、Meifang Lv、Chun Cai
DOI:10.1055/s-0034-1378917
日期:——
The highly stereoselective olefination reaction of α-fluoro-β-keto esters for the synthesis of α-fluoro-α,β-unsaturated esters has been developed. The olefination combines nucleophilic addition, intramolecular nucleophilic addition, and elimination in one step, as well as provides a facile synthetic approach to α-fluoro-α,β-unsaturated esters which are important units in many biologically active compounds
The Z-selective formation of α-fluoro-α,β-unsaturated esters was achieved using the deselenenic acid of the syn- and/or anti-3-aryl-2-fluoro-3-hydroxy-2-organoselanylacetates 3 and 4 with trifluoro...
A Convenient Method for the Synthesis of (<i>Z</i>)-α-Fluoroacrylates: Lewis Base-catalyzed Carbonyl Fluoroolefination Using Fluoro(trimethylsilyl)ketene Ethyl Trimethylsilyl Acetal
作者:Makoto Michida、Teruaki Mukaiyama
DOI:10.1246/cl.2008.890
日期:2008.8.5
A highly useful method is established for the stereoselective synthesis of (Z)-α-fluoroacrylates from various aldehydes and fluoro(trimethylsilyl)ketene ethyl trimethylsilyl acetal in the presence of a Lewis base catalyst. The ketene acetal, easily prepared from ethyl fluoroacetate, affords α-fluoroacrylates in high yields with excellent Z stereoselectivities under mild conditions.
建立了一种非常有用的方法,可在路易斯碱催化剂存在下,从各种醛和氟(三甲基硅基)乙酮三甲基硅基缩醛中立体选择性地合成 (Z)-α-氟丙烯酸酯。由氟乙酸乙酯轻松制备的乙烯酮缩醛可在温和的条件下以高产率和优异的 Z 立体选择性生成 α-氟丙烯酸酯。