[EN] SYNTHESIS OF STRAIGHT-CHAIN LEPIDOPTERAN PHEROMONES THROUGH ONE- OR TWO- CARBON HOMOLOGATION OF FATTY ALKENES [FR] SYNTHÈSE DE PHÉROMONES DE LÉPIDOPTÈRES À CHAÎNE DROITE PAR HOMOLOGATION D'UN OU DEUX ATOMES DE CARBONE D'ALCÈNES GRAS
[EN] SYNTHESIS OF STRAIGHT-CHAIN LEPIDOPTERAN PHEROMONES THROUGH ONE- OR TWO- CARBON HOMOLOGATION OF FATTY ALKENES [FR] SYNTHÈSE DE PHÉROMONES DE LÉPIDOPTÈRES À CHAÎNE DROITE PAR HOMOLOGATION D'UN OU DEUX ATOMES DE CARBONE D'ALCÈNES GRAS
NHC–copper hydrides as chemoselective reducing agents: catalytic reduction of alkynes, alkyl triflates, and alkyl halides
作者:Nick Cox、Hester Dang、Aaron M. Whittaker、Gojko Lalic
DOI:10.1016/j.tet.2014.04.004
日期:2014.7
as well as the NHC–copper-catalyzed reduction of primary alkyl triflates and primary and secondary alkyl iodides and bromides are described. The high chemoselectivity demonstrated in these examples illustrates the mild nature of copper hydride complexes as reducing agents, which have applications in synthetic chemistry beyond their traditional role in the reduction of activated alkenes and carbonyl compounds
Monophasic Catalytic System for the Selective Semireduction of Alkynes
作者:Aaron M Whittaker、Gojko Lalic
DOI:10.1021/ol4001679
日期:2013.3.1
A highly efficient semireduction of alkynes has been developed. Using 0.5–2 mol % of a copper catalyst, semireduction can be accomplished with a wide range of substrates, including both internal and terminal alkynes without over-reduction. The new method has excellent chemoselectivity, and the semireduction can be accomplished even in the presence of nitro and aryl iodo groups. Finally, commercial