Fluorinated amines, compositions and process for preparing said compounds
申请人:Merck & Co., Inc.
公开号:EP0000034A1
公开(公告)日:1978-12-20
Fluorinated Amino acids and amines, compositions and process for preparing said compounds.
a-Difluoromethyl-3,4- di-OR-phenylalanines and its esters, and (1-difluoromethyl)- and 1-(trifluoromethyl)-2-(3,4-di-OR- phenyl) ethylamines, wherein R is hydrogen or a C2-C6 alkanoyl, have been prepared.
Homoveratric acid is transformed into veratryl- difluoromethyl- ketone or veratryl- trifluoro- methyl- ketone, this reacts with methoxyamine, and the obtained O-methyl-oxime is reduced to the amine. The 3- and 4-methoxygroups are hydrolysed into hydroxy-groups.
Reaction of veratryl- difluoromethylketone with ammonium-carbonate and sodium cyanide yields a-difluoromethyl -5-(3',4'- dimethoxybenzyl)-2,4-imidazolidine-dione, hydrolysis results in α-difluoromethyl-3- hydroxytyrosine. The compounds have Dopa-decarboxylase inhibiting activity and some of them are antihypertensive agents.
In Situ Generated Fluorinated Iminium Salts for Difluoromethylation and Difluoroacetylation
作者:Etienne Schmitt、Baptiste Rugeri、Armen Panossian、Jean-Pierre Vors、Sergii Pazenok、Frédéric R. Leroux
DOI:10.1021/acs.orglett.5b02184
日期:2015.9.18
The use of TFEDMA, a fluoroalkyl amino reagent, for the difluoromethylation and difluoroacylation of arenes, heteroarenes, and C-H acidic compounds is reported. This approach allows for an efficient access to difluoromethylated products of high added value in good to excellent yields and with scale-up possibilities.
α,α-Difluoro-α-phenylsulfanyl-α-trimethylsilylmethane as a difluoromethyl building block: A general strategy to α,α-difluoromethyl aryl ketones
The synthetic utility of α,α-difluoro-α-phenylsulfanyl-α-trimethylsilylmethane (PhSCF2SiMe3; 1) as a difluoromethyl building block providing a general strategy to α,α-difluoromethyl aryl ketones was demonstrated. Oxidation, by using m-chloroperoxybenzoic acid, of the readily available 1-aryl-2,2-difluoro-2-phenylsulfanyl-1-trimethylsiloxyethanes obtained from fluoride-catalyzed nucleophilic addition