Nickel-Catalyzed Sonogashira Reactions of Non-activated Secondary Alkyl Bromides and Iodides
作者:Jun Yi、Xi Lu、Yan-Yan Sun、Bin Xiao、Lei Liu
DOI:10.1002/anie.201307069
日期:2013.11.18
A nicked reaction: The title reaction of terminal alkynes with non‐activated secondaryalkyliodides and bromides was accomplished for the first time. This reaction provides a new and practical approach for the synthesis of substituted alkynes (see scheme; cod=cyclo‐1,5‐octadiene).
The reactivity of the highly functionalized copper, zinc reagents RCu(CN)ZnI toward 1-haloalkynes and acetylenic esters
作者:Ming Chang P. Yeh、Paul Knochel
DOI:10.1016/s0040-4039(01)80511-6
日期:1989.1
The highlyfunctionalizedorganometallics RCu(CN)ZnI 1 react efficiently with 1-haloalkynes providing polyfunctionalized alkynes in high yields. This method has been used to prepare a pheromone of the Amathes c-nigrum in 3 steps and 64% overall yield. The reagents 1 also add in the presence of an excess of Me3SiCl to acetylenic esters to afford polyfunctionalized C—silylated ethylenic esters. In the
The first palladium-catalyzed Sonogashira coupling of unactivated secondary alkyl bromides
作者:Gereon Altenhoff、Sebastian Würtz、Frank Glorius
DOI:10.1016/j.tetlet.2006.02.111
日期:2006.4
A palladium-carbene catalyzed Sonogashira coupling of unactivated alkylbromides with alkyl substituted alkynes is reported. For the first time, unactivated secondaryalkyl halides were successfully employed in Sonogashirareactions.
An iron‐catalyzed diboration reaction of alkynes with bis(pinacolato)diboron (B2pin2) and external borating agents (MeOB(OR)2) affords diverse symmetrical or unsymmetrical cis‐1,2‐diborylalkenes. The simple protocol for the diboration reaction can be extended to the iron‐catalyzed carboboration of alkynes with primary and, unprecedentedly, secondary alkyl halides, affording various tetrasubstituted
Alkynylatlon of aldehydic CH bonds via reaction with acetylenic triflones
作者:Jianchun Gong、P.L. Fuchs
DOI:10.1016/s0040-4039(96)02413-6
日期:1997.2
Reaction of aldehydes with acetylenic triflones affords acetylenic ketones and alkylated acetylenesvia the intermediacy of acyl radicals, the product ratio being highly dependent upon aldehyde structure and reaction conditions.