Nickel-Catalyzed Reductive Cross-Coupling of Vinyl Bromides with Unactivated Alkyl Halides
作者:Qun Qian、Kunhua Lin、Hegui Gong、Jun Gu、Canbin Qiu、Wenbin Lu
DOI:10.1055/s-0036-1588132
日期:——
ligand for the reductive vinylation of unactivated secondary alkyl halides under Ni-catalyzed conditions has been developed. Both alkyl- and aryl-substituted vinyl bromides are suitable, in which alkyl-decorated α-alkenyl bromides resulted in the α-products in good results. The use of pyridine as the sole ligand for the reductive vinylation of unactivated secondary alkyl halides under Ni-catalyzed conditions
Chemoselective oxidation of organozinc reagents with oxygen
作者:Ingo Klement、Henning Lütjens、Paul Knochel
DOI:10.1016/s0040-4020(97)00603-0
日期:1997.7
Functionalized organozinc compounds prepared by hydrozincation, carbozincation or by boron-zincexchange can be directly oxidized in a selective manner to the corresponding functionalized alcohols or hydroperoxides depending on the reaction conditions.
Copper(I) Salt Promoted Reactions of Sulfur Nucleophiles with Vinyl Bromides. Simple and Straightforward Preparations of S-Vinyl Thiobenzoates and S,S′-Vinylidene Bisthiobenzoates
Copper(I) salt promoted reaction of vinyl bromides with dibenzoyl disulfide in hot aprotic polar solvent produced thiophene derivatives in moderate yields, while the corresponding reaction with sodium thiobenzoate led to S-vinyl thiobenzoates in good yields.
Direct C–H arylation and alkenylation of 4,4′-dialkylimidazolones with a broad range of halides under palladium and copper catalysis have been developed.
作者:Dietmar Seyferth、James K. Heeren、Gurdial Singh、Samuel O. Grim、William B. Hughes
DOI:10.1016/s0022-328x(00)80365-4
日期:1966.3
The action of phenyllithium on (bromomethyl)triphenylphosphonium bromide results in a nearly equimolar mixture of triphenylphosphinebromomethylene (formal H÷ abstraction) and triphenylphosphinemethylene (formal Br÷ abstraction). With (iodomethyl)triphenylphosphonium iodide a mixture of triphenylphosphineiodomethylene and triphenylphosphinemethylene is formed in which the latter is favored by a factor