Abstract A number of alkyl, aryl and bifunctional isothiocyanates are obtained in moderate to high yields (41–94%) in a two-step, one-pot reaction of the parent primary amines or their salts with carbondisulfide, followed by reaction of the thus formed dithiocarbamates with T3P® (propane phosphonic acid anhydride) as a new and efficient desulfurating agent. A number of alkyl, aryl and bifunctional isothiocyanates
Optimized Procedures for One-Pot Conversion of Alkyl Bromides into Amines via the Staudinger Reaction
作者:Anna Koziara、Andrzej Zwierzak
DOI:10.1055/s-1992-26300
日期:——
New optimized procedures for transforming primary and secondary alkyl bromides into the corresponding primary amine salts have been elaborated. Essential modifications of azidation and deprotection of intermediate triethoxyphosphine alkylimides resulted in substantial improvement of the overall yields. Conversion of ammonium tosylates and hydrochlorides into free amines in a non-aqueous medium is described.
A simple amine protection strategy for olefinmetathesis reactions
作者:Clint Peter Woodward、Nicolas Daniel Spiccia、William Roy Jackson、Andrea Jane Robinson
DOI:10.1039/c0cc03716h
日期:——
Acyclic diamines are valuable feedstocks for polyamide synthesis. Ruthenium-alkylidene catalysed cross metathesis of amino alkenes is problematic and acyl derivatisation can result in less efficient syntheses, poor catalyst turnover and isomerisation. Temporary amine masking via stable and soluble ammonium salts delivers cyclic and acyclic aminoalkenes in high yield and purity.
[EN] PROCESSES FOR PRODUCING AMINE COMPOUNDS<br/>[FR] PROCÉDÉ DE PRODUCTION DE COMPOSÉS AMINE
申请人:UNIV MONASH
公开号:WO2014005196A1
公开(公告)日:2014-01-09
The present invention provides processes for producing amine-containing compounds such as diammonium salts and amino acid derivatives comprising the steps of subjecting a salt of an amine bearing an unsaturated group to a self-metathesis reaction with itself to produce a diammonium salt or to a cross-metathesis with a suitable α,β-unsaturated acid, ester or amide to form an amino acid salt or a derivative thereof. The salts produced by the metathesis reactions can then be subjected to hydrogenation to reduce the double bond which is formed in the metathesis reaction.
Cross-Metathesis of Brønsted Acid Masked Alkenylamines with Acrylates for the Synthesis of Polyamide Monomers
作者:Nicolas Daniel Spiccia、Szabolcs Solyom、Clint Peter Woodward、William Roy Jackson、Andrea Jane Robinson
DOI:10.1021/acs.joc.5b02484
日期:2016.3.4
Ruthenium–alkylidene-catalyzed cross-metathesis of a range of homologous alkenylamine salts provides expedient and high-yielding routes to commercially valuable polyamide monomers using a single catalyst, telescopic workup, and mild experimental conditions.