Regiospecific Hydroamination of Unsymmetrical Electron-Rich and Electron-Poor Alkynes with Anilines Catalyzed by Gold(I) Immobilized in MCM-41
作者:Dayi Liu、Quan Nie、Rongli Zhang、Mingzhong Cai
DOI:10.1002/adsc.201800621
日期:2018.10.18
heterogeneous gold(I)‐catalyzedregiospecifichydroamination of ynamides and propiolic acid derivatives with anilines has been achieved by using a diphenylphosphine‐functionalized MCM‐41‐supported gold (I) complex and AgNTf2 as catalysts under mild conditions, yielding the corresponding (E)‐N‐arylimines and (Z)‐enamines in good to excellent yields with broad substrate scope. The new heterogeneous gold(I) complex
Copper-Catalyzed Aerobic Oxidative Amidation of Terminal Alkynes: Efficient Synthesis of Ynamides
作者:Tetsuya Hamada、Xuan Ye、Shannon S. Stahl
DOI:10.1021/ja077406x
日期:2008.1.1
A copper-catalyzed method for the preparation of ynamides has been identified that proceeds via aerobicoxidative coupling of terminal alkynes with various nitrogen nucleophiles, including cyclic carbamates, amides and ureas, and N-alkyl-arylsulfonamides and indoles.
Regio‐ and Stereoselective 1,2‐Carboboration of Ynamides with Aryldichloroboranes
作者:Cai You、Mika Sakai、Constantin G. Daniliuc、Klaus Bergander、Shigehiro Yamaguchi、Armido Studer
DOI:10.1002/anie.202107647
日期:2021.9.27
Catalyst-free 1,2-carboboration of ynamides is presented. Readily available aryldichloroboranes react with alkyl- or aryl-substituted ynamides in high yields with complete regio- and stereoselectivity to valuable β-boryl-β-alkyl/aryl α-aryl substituted enamides which belong to the class of trisubstituted alkenylboronates. The 1,2-carboboration reaction is experimentally easy to conduct, shows high
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.
Palladium-Catalyzed Tandem-Cyclization of Functionalized Ynamides: An Approach to Benzosultams
作者:Alla Siva Reddy、A. Leela Siva Kumari、Soumen Saha、K. C. Kumara Swamy
DOI:10.1002/adsc.201500854
日期:2016.5.19
afford a wide range of hetero‐substituted benzosultams (1,2‐benzothiazine 1,1‐dioxides) has been achieved. Medicinally useful compounds like nortriptyline and eugenol could also be used as nucleophiles. Base has a significant effect in the cyclization process, depending on the nucleophile source used. DFT studies suggest that the reaction involves a [Pd(II)]–[Pd(0)]–[Pd(II)] cycle. Structures of key products