[EN] COMPLEXES FOR NUCLEOPHILIC, RADICAL, AND ELECTROPHILIC POLYFLUOROALKYLATION<br/>[FR] COMPLEXES POUR POLYFLUOROALKYLATION NUCLÉOPHILE, RADICALAIRE ET ÉLECTROPHILE
申请人:UNIV MICHIGAN REGENTS
公开号:WO2017223406A1
公开(公告)日:2017-12-28
Disclosed herein are borazine complexes and use of the same in perfluoroalkylation reactions.
Borazine‐CF
<sub>3</sub>
<sup>−</sup>
Adducts for Rapid, Room Temperature, and Broad Scope Trifluoromethylation
作者:Jacob B. Geri、Michael M. Wade Wolfe、Nathaniel K. Szymczak
DOI:10.1002/anie.201711316
日期:2018.1.26
A fluoroform‐derived borazine CF3− transfer reagent is used to effect rapid nucleophilic reactions in the absence of additives, within minutes at 25 °C. Inorganic electrophiles spanning seven groups of the periodic table can be trifluoromethylated in high yield, including transition metals used for catalytic trifluoromethylation. Organic electrophiles included (hetero)arenes, enabling C−H and C−X
Acid-promoted cyclization of 2,4-diaryl-1,1,1-trifluorobut-3-en-2-oles and their TMS-ethers into CF<sub>3</sub>-indenes
作者:Matvei Yu. Martynov、Roman O. Iakovenko、Anna N. Kazakova、Irina A. Boyarskaya、Aleksander V. Vasilyev
DOI:10.1039/c7ob00406k
日期:——
2,4-Diaryl-1,1,1-trifluorobut-3-en-2-oles and their TMS-ethers in H2SO4 at room temperature in just 2 min are quantitatively cyclized into 1-aryl-3-trifluoromethyl-1H-indenes. The reaction proceeds through an intermediate formation of the corresponding CF3-allyl cations, which are cyclized regioselectively at the allyl carbon atom most remote from the CF3-group. The obtained CF3-indenes in solution
在室温下仅2分钟的时间内,将2,4-二芳基-1,1,1-三氟丁-3-烯-2-烯烃及其TMS-醚在H 2 SO 4中定量环化成1-芳基-3-三氟甲基- 1 H-茚。该反应通过中间形成相应的CF 3-烯丙基阳离子进行,该中间体在最远离CF 3-基团的烯丙基碳原子上区域选择性地环化。将得到的CF 3-茚在EtOAc溶液中,在硅胶存在下,在室温下于4小时内定量异构化成3-芳基-1-三氟甲基-1 H-茚。
Enantioselective Phosphine-Catalyzed Allylic Alkylations of <i>mix</i>-Indene with MBH Carbonates
作者:Junyou Zhang、Hai-Hong Wu、Junliang Zhang
DOI:10.1021/acs.orglett.7b02895
日期:2017.11.17
reported using a simple chiral sulfinamide phosphine-catalyzed asymmetric allylicalkylation of a mixture of indenes with Morita–Baylis–Hillman carbonates. The resulting derivatives can serve as a valuable synthetic building block for some drugs and natural products. Broad substrate scope and high regio- and enantioselectivity of this reaction were particularly remarkable.
DIRECT TRIFLUOROMETHYLATIONS USING TRIFLUOROMETHANE
申请人:Prakash G.K. Surya
公开号:US20140066640A1
公开(公告)日:2014-03-06
A direct trifluoromethylation method preferably using a trifluoromethane as a fluoro-methylating species. In particular, the present method is used for preparing a trifluoromethylated substrate by reacting a fluoromethylatable substrate with a trifiuoromethylating agent in the presence of an alkoxide or metal salt of silazane under conditions sufficient to trifluoromethylate the substrate; wherein the fluoromethylatable substrate includes chlorosilanes, carbonyl compounds such as esters, aryl halides, aldehydes, ketones, chalcones, alkyl formates, alkyl halides, aryl halides, alkyl borates, carbon dioxide or sulfur.