[EN] SILYLETHYNYL PENTACENE COMPOUNDS AND COMPOSITIONS AND METHODS OF MAKING AND USING THE SAME [FR] COMPOSÉS DE SILYLÉTHYNYLE PENTACÈNE ET COMPOSITIONS ET PROCÉDÉS DE PRODUCTION ET D'UTILISATION DE CEUX-CI
Regio- and Stereoselective Hydrosilylation of Unsymmetrical Alkynes Catalyzed by a Well-Defined, Low-Valent Cobalt Catalyst
作者:Alejandro Rivera-Hernández、Brendan J. Fallon、Sandrine Ventre、Cédric Simon、Marie-Hélène Tremblay、Geoffrey Gontard、Etienne Derat、Muriel Amatore、Corinne Aubert、Marc Petit
DOI:10.1021/acs.orglett.6b01987
日期:2016.9.2
Herein, the use of a well-defined low-valent cobalt(I) catalyst [HCo(PMe3)4] capable of performing the highlyregio- and stereoselectivehydrosilylation of internal alkynes is reported. The reaction can be applied to a variety of hydrosilanes, symmetrical and unsymmetrical alkynes, giving in many cases a single hydrosilylation isomer. Experimental and theoretical studies suggest the key step to be
Modular Approach to Reductive C<sub>sp2</sub>–H and C<sub>sp3</sub>–H Silylation of Carboxylic Acid Derivatives through Single-Pot, Sequential Transition Metal Catalysis
modular approach to catalytic reductive Csp2–H and Csp3–H silylation of carboxylic acid derivatives encompassing esters, ketones, and aldehydes. Choice of either an Ir(I)/Rh(I) or Rh(I)/Rh(I) sequence leads to either exhaustive reductive ester or reductiveketone/aldehyde silylation, respectively. Notably, a catalyst-controlled direct formation of doubly reduced silyl ethers is presented, specifically
2‐(alkynylsilylethynyl)phenols, leading to alkynylmethylidene‐benzoxasiloles through concomitant silicon and carbon migration. This unprecedented cycloisomerization presumably proceeds via the formation of rhodium vinylidenes through 1,2‐silicon migration, followed by 1,3‐carbon (alkyne) migration via the formation of hypervalent silicon centers.
[EN] SYNTHESIS OF SILYL ACETYLENES<br/>[FR] SYNTHÈSE DE SILYLACÉTYLÈNES
申请人:3M INNOVATIVE PROPERTIES CO
公开号:WO2011150020A1
公开(公告)日:2011-12-01
The present disclosure provides a method of preparing silylethynyl compounds in which two of the hydrocarbyl groups bonded to the silicon exclusive of the ethynyl group, are the same and one is different, that may be used in preparing novel silylethynyl functionalized acene semiconductor chromophores.
Silylethynyl Pentacene Compounds and Compositions and Methods of Making and Using the Same
申请人:Caldwell Gregg Alexander
公开号:US20110073813A1
公开(公告)日:2011-03-31
Silylethynyl pentacenes and compositions containing silylethynyl pentacenes are disclosed. Exemplary pentacene compounds have 6,13-silylethynyl substitution with one or more groups (e.g., R, R′ and R″) covalently bonded to each Si atom of the silylethynyl groups. Methods of making and using silylethynyl pentacenes and compositions containing silylethynyl pentacenes are also disclosed. Substrates and devices comprising the silylethynyl pentacenes and compositions are also disclosed.