Asymmetric Allylation/RCM-Mediated Synthesis of Fluorinated Benzo-Fused Bicyclic Homoallylic Amines As Dihydronaphthalene Derivatives
作者:Daniel M. Sedgwick、Pablo Barrio、Antonio Simón、Raquel Román、Santos Fustero
DOI:10.1021/acs.joc.6b01590
日期:2016.10.7
Enantiomericallyenriched fluorinated benzo-fused bicyclic homoallylic amines have been synthesized through an asymmetricallylation/ring closing metathesis (RCM) sequence. This sequence has been carried out using α-trifluoromethylstyrene derivatives as key intermediates, synthesized by microwave radiation. The great deactivating effect exerted by such substituents has been brought to light by a comparative
Cyclization of<i>o</i>-Functionalized α-Trifluoromethylstyrenes: Synthesis of Isoquinoline Derivatives Bearing Fluorinated One-Carbon Units
作者:Takashi Mori、Yu Iwai、Junji Ichikawa
DOI:10.1246/cl.2005.778
日期:2005.6
α-Trifluoromethylstyrenes with a formimidoyl, an N-hydroxyformimidoyl, or a tosylamidomethyl group at the ortho position undergo intramolecular addition or SN2′-type substitution at the trifluoromethylvinyl moiety, leading to a variety of isoquinoline derivatives bearing 4-trifluoromethyl, 4-difluoromethyl, and 4-difluoromethylene groups.
Trifluoroisopropenylzinc reagent as a useful .alpha.-(trifluoromethyl)ethenyl carbanion synthetic equivalent. Preparation and palladium-catalyzed coupling with aryl halides
作者:Biao Jiang、Yuanyao Xu
DOI:10.1021/jo00026a028
日期:1991.12
Synthesis of Isochromanes and Isothiochromanes Bearing Fluorinated One-Carbon Units via Intramolecular Cyclizations of ortho-Substituted α-(Trifluoromethyl)styrenes
作者:Junji Ichikawa、Masahiro Ikeda、Masahiro Hattori
DOI:10.3987/com-08-s(f)114
日期:——
alpha-(Trifluoromethyl)styrenes bearing a nucleophilic oxygen or sulfur atom tethered by a methylene or methyne unit at the ortho carbon were prepared by the coupling reaction of 2-bromo-3,3,3-trifluoropropene with aryl iodides via (3,3,3-trifluoroprop-1-en-2-yl) boronic acid. The styrenes thus obtained readily undergo an intramolecular nucleophilic addition or substitution (S(N)2'-type) of the oxygen and sulfur under basic conditions, leading to 4-trifluoromethyl- or 4-difluoromethylene-substituted isochromanes and isothiochromanes, respectively.