Generation of gold carbenes in water: efficient intermolecular trapping of the α-oxo gold carbenoids by indoles and anilines
作者:Long Li、Chao Shu、Bo Zhou、Yong-Fei Yu、Xin-Yu Xiao、Long-Wu Ye
DOI:10.1039/c4sc00983e
日期:——
efficient intermolecular reaction of gold carbene intermediates, generated via gold-catalyzedalkyneoxidation, with indoles and anilines has been realized in aqueous media. Importantly, it was revealed for the first time that water could dramatically suppress the undesired over-oxidation, providing a general and practical solution to the problem of over-oxidation in gold-catalyzedintermolecular alkyne
Radical Additions of Arenethiols to Ynamides for the Selective Synthesis of N-[(Z)-2-(Arylsulfanyl)-1-alkenyl]amides
作者:Akinori Sato、Hideki Yorimitsu、Koichiro Oshima
DOI:10.5012/bkcs.2010.31.03.570
日期:2010.3.20
A variety of ynamides undergo highly regio- and stereoselective radical addition of arenethiols with the aid of trie-thylborane as a radical initiator. The products, N-[(Z)-2-arylsulfanyl-1-alkenyl]amides, can be reduced with triethylsilane in trifluoroacetic acid to yield N-[2-(arylsulfanyl)alkyl]amides.
Thieme Chemistry Journal Awardees - Where
are They Now? Regio- and Stereoselective Radical Additions
of Thiols to Ynamides
作者:Hideki Yorimitsu、Koichiro Oshima、Akinori Sato
DOI:10.1055/s-0028-1087379
日期:——
Regioselective and stereoselective radical additions of arenethiols to various ynamides have been developed. Mixing ynamides and arenethiols in the presence of a catalytic amount of triethylborane affords the corresponding adducts, (Z)-1-amino-2-thio-1-alkenes, in excellent yields with high selectivities. The products can be reduced by means of trifluoroacetic acid and triethylsilane to yield 1-amino-2-thioalkanes.
Synthesis of α,β-Unsaturated <i>N</i>-Sulfonyl Imides through Zinc-Catalyzed Intermolecular Oxidation of <i>N</i>-Sulfonyl Ynamides
作者:Fei Pan、Chao Shu、Yi-Fan Ping、Yi-Fei Pan、Peng-Peng Ruan、Qian-Ran Fei、Long-Wu Ye
DOI:10.1021/acs.joc.5b01608
日期:2015.10.16
A novel zinc-catalyzed intermolecular oxidation of N-sulfonyl ynamides has been developed. A variety of functionalized alpha,beta-unsaturated N-sulfonyl imides are readily accessed by utilizing this approach, thus providing a viable alternative to synthetically useful alpha,beta-unsaturated imides. Importantly, the reaction is proposed to proceed by a vinyligous E2-type elimination pathway, but not metal carbene pathway.