Palladium-Catalyzed Intermolecular Three-Component Coupling of Organic Halides with Alkynes and Alkenes: Efficient Synthesis of Oligoene Compounds
作者:Kana Shibata、Tetsuya Satoh、Masahiro Miura
DOI:10.1002/adsc.200700171
日期:2007.10.8
intermolecular three-componentcoupling of aryl or vinyl halides, diarylacetylenes, and monosubstituted alkenes effectively proceeds in the presence of palladium acetate, lithium chloride, and sodium bicarbonate as catalyst, promoter, and base, respectively, in aqueous DMF or DMSO to produce the corresponding 1,3-butadiene or 1,3,5-hexatriene derivatives. Use of dienyl bromides allows the coupling to afford
Palladium-catalyzed reactions of vinyl bromides with disubstituted alkynes: a new synthesis of fulvenes
作者:Lee J. Silverberg、Guangzhong Wu、Arnold L. Rheingold、Richard F. Heck
DOI:10.1016/0022-328x(91)80026-g
日期:1991.6
reaction of vinylic bromides with disubstituted acetylenes at 100°C in the presence of triethylamine produces penta- or hexa-substituted fulvenes in low to moderate yields. Reactions with 3-hexyne under the same conditions usually yield dialkylidenecyclopentenes as products, apparently by rearrangement of the expected fulvenes. Fulvenes formed from the reaction of disubstituted alkynes with Z-2-bromovinyl
Einfache Synthesen von 1,2-Diaryl- und Triarylethenen mit trägergebundenen Fluoridbasen
作者:D. Hellwinkel、K. Göke、R. Karle
DOI:10.1055/s-1994-25617
日期:——
Facile Syntheses of 1,2-Diaryl- and Triarylethenes with Supported Fluoride Bases Differently substituted arenecarbaldehydes, mainly benzaldehydes, can be very efficiently condensed with a wide variety of methylbenzenes having an electron-withdrawing group in the para-position, as well as with fluorenes, xanthene, cyclopentadienes and indenes by using a standardized KF- or CsF-Al2O3 base system in dimethylformamide.
Synthesis of spiro-pyrazolines: reaction of 1,3-diphenylnitrilimine with fulvenes
作者:D.N. Dhar、R. Ragunathan
DOI:10.1016/s0040-4020(01)91808-3
日期:1984.1
A one-step synthesis of a new series of spiro-pyrazolines has been accomplished by the 1,3-dipolar cycloaddition of 1,3-diphenylnitrilimine with various fulvenes (2,3,4,5-tetraphenyl fulvene (1) and its analogues (2, 3), 9-benzalfluorene (7) and its analogues (8, 9) and 6,6-diphenylfluvene (13)). With the exception of 13 all other fulvenes undergo 1,3-dipolar cycloaddition across the exocyclic double
The properties of a number of heteronium tetraphenylcyclopentadienylides with a variety of hetero-atoms are reported, including their UV spectra, basicities, and reactivities towards aldehydes and nitrosobenzene. These properties are very dependent on the identity of the hetero-atoms; with elements of either Group V or Group VI of the periodic table the dipolar and nucleophilic character of the ylides