Copper-Catalyzed Decarboxylative Alkylation of Terminal Alkynes
作者:Changqing Ye、Yajun Li、Hongli Bao
DOI:10.1002/adsc.201700798
日期:2017.11.10
alkylation of terminal alkynesundermild reaction conditions has been reported. Various alkyl diacyl peroxides were applied as the alkyl source for the formation of C(sp3)−C(sp) bond. A range of terminal alkynes including arylalkynes and alkyl alkynes delivered the alkylated internal alkynes with good to high performances. Mechanism studies suggested that this reaction involves a free radical pathway.
Conversion of Bromoalkenes into Alkynes by Wet Tetra-<i>n</i>-butylammonium Fluoride
作者:Masaru Okutani、Yuji Mori
DOI:10.1021/jo802101a
日期:2009.1.2
Tetra-n-butylammonium fluoride was found to be a mild and efficient base for the elimination reaction of bromoalkenes. Treatment of 1,1-dibromoalkenes, (Z)-1-bromoalkenes, and internal bromoalkenes with 5 equiv of TBAF center dot 3H(2)O in DMF yielded terminal and internal alkynes in high yields without undue regard to the presence of water.
Iron‐Catalyzed Radical Decarboxylative Oxyalkylation of Terminal Alkynes with Alkyl Peroxides
作者:Xiaotao Zhu、Changqing Ye、Yajun Li、Hongli Bao
DOI:10.1002/chem.201701830
日期:2017.8
An iron‐catalyzed oxyalkylation of alkynes with alkyl peroxides as the alkylating reagents has been investigated. Alkyl peroxides are readily available from aliphatic acids and serve simultaneously as the alkylating reagents and internal oxidants. Primary, secondary, and tertiary alkyl groups of aliphatic acids were readily incorporated into C−C triple bonds and diverse α‐alkylated ketones were synthesized
Homolytically induced decompositions of unsaturated peroxyacetals, synthesized from aldehydes, gave alkoxyalkoxyl radicals that yielded alkyl radicals by rapid beta-scission. The latter radicals could react with several types of "transfer agents" to smoothly bring about homolytic decarbonylative functional group transformations of aldehydes into halides, hydrocarbons, xanthates, alkanenitriles, 2-