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Vinyl-halides-metathesis, the phosphine-free “second-generation” blechert/hoveyda−grubbs catalyst ru(═c(h)c6h4-o-o-i-pr)(h2imes)cl2 (h2imes = 4,5-dihydro-1,3-dimesitylimidazol-2-ylidene) and piers catalyst [ru(═chpcy3)(h2imes)cl2]bf4 (cy = cyclo-c6h11) for olefin metathesis effected cross-metathesis (cm) of vinyl chloride and 1,2-dichloroethene with several unhindered terminal and internal alkenes in up to 95 .... In organic chemistry, a vinyl halide is a compound with the formula ch 2 =chx (x = halide).the term vinyl is often used to describe any alkenyl group. for this reason, alkenyl halides with the formula rch=chx are sometimes called vinyl halides. from the perspective of applications, the dominant member of this class of compounds is vinyl chloride, which is produced on the scale of millions of ..., s2 1. general 1.1. equipment and chemicals used all reactions were carried out under ar in pre-dried glassware using schlenk techniques. the anhydrous solvents were dried by distillation over cah2 and were transferred under argon: (e)-1,2-dichloroethene (fluka), (z)-1,2-dichloroethene (aldrich, contains 15% mol of e isomer), ch2cl2. flash column and preparative thin layer chromatographies were ....

A large number of biologically active compounds, including natural products and therapeutics, contain substituted olefins. chemical synthesis of these motifs can be accomplished by pd(0)-, ni(0)-, or..., request pdf | cross-metathesis of vinyl halides. scope and limitations of ruthenium-based catalysts | the phosphine-free “second-generation” blechert/hoveyda−grubbs catalyst ru(c(h)c6h4-o-o ....

The first successful example of olefin cross-metathesis with chloroalkenes is reported., request pdf | olefin cross-metathesis with vinyl halides | the first successful example of olefin cross-metathesis with chloroalkenes is reported. | find, read and cite all the research you need .... F-vinyl iodides and bromides react directly with cadmium or zinc metal to stereospecifically produce the corresponding f-vinyl cadmium and zinc reagents. these vinyl cadmium and zinc reagents exhibit excellent thermal stability (> 100°c) and do not couple with f-vinyl halides. metathesis with cu(i) salts gives the analogous f-vinyl copper reagents. the f-vinyl copper reagents readily undergo ..., functionalized vinyl pinacol boronates suitable for suzuki cross-coupling reactions are synthesized using ruthenium-catalyzed olefin cross-metathesis of 1-propenyl pinacol boronate and various alkenes, including functionalized and 1,1-disubstituted alkenes. the resultant boronate cross products are stereoselectively transformed into predominantly z-vinyl bromides and e-vinyl iodides..

Olefins with a halide substituent are a mainstay in chemistry. alkenyl chlorides and bromides are found in biologically active natural products (e.g., the recently isolated z-alkenyl chloride containing neuromodulator janthielamide a 1 or bromine-containing fatty acids that are adipogenesis stimulators 2) or can be used in some of the most central transformations in chemistry (i.e., catalytic ...