Oxidation and chlorination reactions of perfluoroketene-N,S-acetals
摘要:
The paper presents the results of the investigation of oxidation and chlorination reactions of perfluoroketene-N,S-acetals. Oxidation reactions of perfluoroketene-N,S-acetals proved to be dependent on the nature of oxidizing agent and led to the formation of corresponding sulfone in the case of m-chloroperbenzoic acid or amides of alpha-H-perfluoroalkane carboxylic acids in the case of tert-butyl hydroperoxide or hydrogen peroxide. Reaction of 1-tert-butylsulfanyl-2,3,3,4,4,4-hexafluoro-1-[N-methyl,N-((S)-alpha-methylbenzyl)amino]-but-1-ene with sulfuryl chloride demonstrated the chlorination of perfluoroketene-N,S-acetals as a new approach in the synthesis of chiral alpha-chloro perfluoroalkane carboxylic acid amides. (C) 2009 Elsevier B.V. All rights reserved.
<i>N</i>-Acylbenzotriazoles: Neutral Acylating Reagents for the Preparation of Primary, Secondary, and Tertiary Amides
作者:Alan R. Katritzky、Hai-Ying He、Kazuyuki Suzuki
DOI:10.1021/jo000792f
日期:2000.12.1
Readily available N-acylbenzotriazoles 2a-q efficiently acylate aqueous ammonia and primary and secondaryamines to give primary, secondary, and tertiary amides in good to excellent yields. The wide applicability of the procedure is illustrated by the preparation of (i) alpha-hydroxyamides from alpha-hydroxy acids and of (ii) perfluoroalkylated amides.
The Wittig reaction of perfluoro acid derivatives: access to fluorinated enol ethers, enamines, and ketones
作者:Jean Pierre Begue、Daniele Bonnet-Delpon、Dany Mesureur、Gerard Nee、Sheng Wen Wu
DOI:10.1021/jo00040a017
日期:1992.7
The preparation of novel perfluoroalkyl-substituted compounds in good yields is described. This preparation involves the Wittig reaction of a phosphonium ylide with perfluoroalkyl acid derivatives. The influence of the structure of the starting alkylidenetriphenylphosphoranes, the perfluoroalkyl reagents, and the reaction conditions has been investigated. Trifluoroacetamides lead to a Z/E mixture of enamines 3. Perfluoroalkyl esters (Rf = CF3, C2F5, C3F7, C7F15, CF2Cl) lead to only the (Z)-enol ethers 8-12 when reactions are performed with NaNH2 as a base and to 1-perfluoroalkyl ketones 13-17 when reactions are performed with BuLi.
Reactions of Amines with Esters of Polyhalogenated Acids
作者:Madeleine M. Joullié
DOI:10.1021/ja01629a090
日期:1955.12
Oxidation and chlorination reactions of perfluoroketene-N,S-acetals
作者:Sergiy S. Mykhaylychenko、Jean-Philippe Bouillon、Yuriy G. Shermolovich
DOI:10.1016/j.jfluchem.2009.06.019
日期:2009.10
The paper presents the results of the investigation of oxidation and chlorination reactions of perfluoroketene-N,S-acetals. Oxidation reactions of perfluoroketene-N,S-acetals proved to be dependent on the nature of oxidizing agent and led to the formation of corresponding sulfone in the case of m-chloroperbenzoic acid or amides of alpha-H-perfluoroalkane carboxylic acids in the case of tert-butyl hydroperoxide or hydrogen peroxide. Reaction of 1-tert-butylsulfanyl-2,3,3,4,4,4-hexafluoro-1-[N-methyl,N-((S)-alpha-methylbenzyl)amino]-but-1-ene with sulfuryl chloride demonstrated the chlorination of perfluoroketene-N,S-acetals as a new approach in the synthesis of chiral alpha-chloro perfluoroalkane carboxylic acid amides. (C) 2009 Elsevier B.V. All rights reserved.