[EN] HYDROSILYLATION REACTION CURABLE COMPOSITIONS AND METHODS FOR THEIR PREPARATION AND USE [FR] COMPOSITIONS DURCISSABLES PAR UNE RÉACTION D'HYDROSILYLATION ET LEURS PROCÉDÉS DE PRÉPARATION ET D'UTILISATION
in the synthesis of silyl-functionalized alkynes via silylative coupling of terminal alkynes/diynes with iodosilanes, we propose a new protocol allowing employment of various mono- and dichlorosilanes as reagents. The process is based on a sequence of two reactions occurring simultaneously: i.e., conversion of initial chlorosilane (SiR1nCl4–n) to the appropriate iodosilane via Cl/I nucleophilic substitution
NEW (TRIORGANOSILYL)ALKYNES AND THEIR DERIVATIVES AND A NEW CATALYTIC METHOD FOR OBTAINING NEW AND CONVENTIONAL SUBSTITUTED (TRIORGANOSILYL)ALKYNES AND THEIR DERIVATIVES
申请人:Kownacki Ireneusz
公开号:US20140005427A1
公开(公告)日:2014-01-02
The present invention relates to new (triorganosilyl)alkynes and their derivatives having general formula 1 R
1
—C≡C—Z (I) In its second aspect, this invention relates to a new selective method for the preparation of new and conventional (triorganosilyl)alkynes and their derivatives having the general formula 1, by the silylative coupling of terminal alkynes with halogenotriorganosilanes in the presence of an iridium catalyst and a tertiary amine.
Investigations on the synthesis of monoarylated diynes by monoprotection/cross-coupling/deprotection approach
作者:Karolin Kral、Marko Hapke
DOI:10.1016/j.tetlet.2012.03.118
日期:2012.6
The presented experimental work investigates the usefulness of temporary monoprotection of symmetrical terminal diynes in the coupling with aryl iodides. The monoprotection/cross-coupling/deprotection approach proved to be efficient for the coupling of diynes with aryl substrates avoiding the formation of diarylated byproducts. The high importance of the ratio of solvents in the Sonogashira coupling
alkynes and diynes with Me3SiI with the aid of NEt(i-Pr)2 occurs smoothly, leading to the formation of mono- and bis-silyl-functionalized alkynyl derivatives. This new reaction, which occurs via direct activation of the Csp−H bond in the starting alkyne, is a very efficient and easy tool for the synthesis of unique silylated alkynes. Separate experiments of the equimolar reactions of the precursor (I) with
[EN] NEW (TRIORGANOSILYL)ALKYNES AND THEIR DERIVATIVES AND A NEW CATALYTIC METHOD FOR OBTAINING NEW AND CONVENTIONAL SUBSTITUTED (TRIORGANOSILYL)ALKYNES AND THEIR DERIVATIVES<br/>[FR] NOUVEAUX (TRIORGANOSILYL)ALCYNES ET LEURS DÉRIVÉS ET NOUVEAU PROCÉDÉ CATALYSÉ POUR OBTENIR DES (TRIORGANOSILYL)ALCYNES SUBSTITUÉS NOUVEAUX ET CLASSIQUES ET LEURS DÉRIVÉS