trifluoromethylalkene derivatives. By using readily available allyl metallics as nucleophilic coupling partner, the present reaction enables an expedient construction of structurally diversified CF2-bridged 1,5-dienes. Furthermore, the exquisite selectivity observed in this transformation is revealed to be based on the underlying mechanism that consists of a cascade of nucleophilic SN2′ defluorinative
Synthesis of Functionalized <i>gem</i>-Difluoroalkenes via a Photocatalytic Decarboxylative/Defluorinative Reaction
作者:Tiebo Xiao、Linyong Li、Lei Zhou
DOI:10.1021/acs.joc.6b01620
日期:2016.9.2
A photocatalytic decarboxylative/defluorinative reaction of α-trifluoromethyl alkenes with α-ketoacids and α-amino acids has been developed. The reaction occurs at room temperature under visible light irradiation, affording various γ,γ-difluoroallylic ketones and 1,1-difluorohomoallyl amines in good yields. The synthetic applications of the resulting functionalized gem-difluoroalkenes were also described
Photocatalytic gem‐Difluoroolefination Reactions by a Formal C−C Coupling/Defluorination Reaction with Diazoacetates
作者:Fang Li、Chao Pei、Rene M. Koenigs
DOI:10.1002/anie.202111892
日期:2022.1.21
Amines unlock an unconventional reaction of diazoalkanes with α-trifluoromethyl styrenes. Under photocatalytic conditions, no cyclopropanation occurs, instead a gem-difluoroolefin is formed via C−C bond formation and fluoride elimination.
Ni-Catalyzed Radical-Promoted Defluoroalkylborylation of Trifluoromethyl Alkenes To Access <i>gem</i>-Difluorohomoallylic Boronates
作者:Jian Qiu、Cece Wang、Lu Zhou、Yixian Lou、Kai Yang、Qiuling Song
DOI:10.1021/acs.orglett.2c00800
日期:2022.4.1
gem-difluoroalkenes and organoboroncompounds. However, the strategies for the construction of gem-difluorohomoallyl boronates has scarcely been described. Herein, we develop an efficient protocol for the construction of gem-difluorohomoallylic boronates through a Ni-catalyzed radical-promoted defluoroalkylborylation of α-trifluoromethyl alkenes with α-haloboronates under mild conditions. This reaction features a
gem -Difluoroalkenyl boronates 是用于构建各种gem -difluoroalkenes和有机硼化合物的有吸引力的合成子。然而,几乎没有描述构建偕二氟高烯丙基硼酸酯的策略。在此,我们开发了一种有效的方案,用于在温和条件下通过 Ni 催化的自由基促进的 α-三氟甲基烯烃与 α-卤代硼酸酯的脱氟烷基硼酸化来构建偕二氟高烯丙基硼酸酯。该反应具有广泛的底物范围、良好的官能团耐受性和多种转化。
Process for Production of 2-(Substituted Phenyl)-3,3,3-Trifluoropropene Compound
申请人:Matoba Kazutaka
公开号:US20100160683A1
公开(公告)日:2010-06-24
There is provided a novel process for production of a 2-(substituted phenyl)-3,3,3-trifluoropropene.
Disclosed is a process for production of a 2-(substituted phenyl)-3,3,3-trifluoropropene compound represented by the formula (7) or a salt thereof The process comprises reacting a compound represented by the formula (1) (X is an alkyl group, etc.) with a compound represented by the formula (2) (Y is a halogen atom, etc.) in the presence of a catalyst represented by the formula (3) (M is an ion of a metal belonging to Group 10 on the elementary periodic table which has an oxidation state number of 1 to 8; G is a unidentate or multidentate ligand; L is a phosphine compound represented by the formula (4) which is bound to the center metal M or is a carbene selected from those represented by the formulae (5) and (6), provided that L's may be same as or different from one another when a is 2 to 5; A represents a univalently or multivalently charged anion; b represents an integer of 1 to 3; a represents an integer of 1 to 5·b; c represents 0 or an integer of 1 to 4·b; and n represents an integer of 1 to 6).