17339-79-6

Upstream product

• 3877-60-9 trans,cis,cis,trans-1,10-Diphenyl-deca-2,4,6,8-tetraen-1,10-dion 
• 629-20-9 1,3,5,7-cyclooctatetraene 
• 98-88-4 benzoyl chloride 
• 133683-83-7 (2E,4E)-1-phenyl-5-(trimethylsilyl)-2,4-pentadien-1-one 

Downstream Products

• 6268-61-7 1,10-diphenyl-decane-1,10-dione 

Relevant academic research and scientific papers

Pd-promoted homocoupling reactions of unsaturated silanes in aqueous micelles

Palladium-promoted homocoupling reaction of vinyl- and polyenylsilanes in aqueous conditions has been investigated. The reaction is catalyzed by PdCl 2 in the presence of the reoxidizing system. CuCl2/LiCl and occurs at room temperature in aqueous solutions containing nonionic amphiphiles. Symmetrically α,ω-disubstituted stereodefined all-trans polyenes have been obtained in mild conditions and in good yields (65-87 %), higher than those previously reported for the same reactions carried, out in methanol or HMPA. A comparison between two commercially available surfactants, Triton X-100 and PTS, has been performed.

Highly Stereoselective Synthesis of Conjugated Polyenes via a Homocoupling Reaction of Unsaturated Silanes

A new method for the synthesis of conjugated polyenes containing up to eight double bonds with all-E configuration is reported.The procedure is based upon a homocoupling reaction of dienyl-, trienyl, or tetraenylsilanes, promoted by PdCl2 in methanol and in the presence of LiCl and CuCl2.Configurational and conformational assignments were rigorously made on the basis of NMR spectra.The compounds obtained represent a novel interesting class of symmetrically substituted polyenes with potential optical and electrooptical properties.By changing the solvent, the homocoupling process can be switched to the halogenation of the silyl-substituted terminal double bond, thus leading to polyenyl halides.