(E )-2-chloro-4-phenyl-1,3-butadiene;(E)-1-phenyl-3-chloro-1,3-butadiene;1-phenyl-3-chloro-1(E),3-butadiene;3-chloro-1-phenyl-1,3-butadiene;3-chloro-1t-phenyl-buta-1,3-diene;3-Chlor-1t-phenyl-buta-1,3-dien;[(1E)-3-chlorobuta-1,3-dienyl]benzene
backbone and the allenyl side chains, Lewis acid-catalyzed three-component condensationreactions of aldehydes, alkoxytrimethylsilanes, and 1-trimethylsilyl-2-butyne were studied. The reaction of these three compounds took place in the presence of a catalytic amount of TrClO4 at −78°C to yield the corresponding α-allenyl ethers in good yields. This reaction was also applied to the synthesis of a polyether
Synthesis of 4-Aryl- and 4-Alkyl-2-silyl-1,3-butadienes and Their Diels−Alder/Cross-Coupling Reactions
作者:Christopher S. Junker、Mark E. Welker、Cynthia S. Day
DOI:10.1021/jo1017734
日期:2010.12.3
An ene-yne cross methasis of silyl-substituted alkynes and alkenes has been developed as a route to 4-aryl- and 4-alkyl-2-silyl-substituted 1,3-dienes. The dienes prepared were used to affect highly diastereoselective Diels−Alderreactions and then the silicon-substituted Diels−Alder cycloadducts were used in Hiyama cross-coupling reactions. The cross-coupling reactions enable these silicon dienes
Subtle Electronic Effects in Metal-Free Rearrangement of Allenic Alcohols
作者:Venkata R. Sabbasani、Phani Mamidipalli、Huijie Lu、Yuanzhi Xia、Daesung Lee
DOI:10.1021/ol400331r
日期:2013.4.5
and stereoselective rearrangement of allenic alcohols to (E,E)-1,3-dien-2-yl triflates and chlorides was developed under metal-free conditions. Subtle electronic effects of the alkyl and aryl substituents on the carbon bearing the hydroxyl group has a profound impact on the reaction rate and efficiency such that vinyl triflates were obtained from electron-deficient substrates and trimethylsilyl triflate
Chloroalkenes, important building blocks for cross-coupling reactions, are prepared in one step by the Suzuki reaction of 1,1-dichloroethylene and 1,2-dichloroethylene with alkenyl- and arylboronic acids. Under the proper reaction conditions, it is possible to obtain the monocoupling reaction to provide the corresponding chloroalkenes with good yields. This method represents an excellent route for
A Mild Synthesis of Vinyl Halides and <i>gem</i>-Dihalides Using Triphenyl Phosphite−Halogen-Based Reagents
作者:Alberto Spaggiari、Daniele Vaccari、Paolo Davoli、Giovanni Torre、Fabio Prati
DOI:10.1021/jo061346g
日期:2007.3.1
A new application of (PhO)(3)P-halogen-based reagents to the synthesis of vinyl halides and gem-dihalides is described. Vinyl halides were prepared in good to excellent yields from enolizable ketones, whereas aldehydes afforded the corresponding gem-dihalides. The halogenation proceeded smoothly under mild conditions.