Platinum-Catalyzed, One-Pot Tandem Synthesis of Indoles and Isoquinolines via Sequential Rearrangement of Amides and Aminocyclization
作者:Noriko Okamoto、Kei Takeda、Reiko Yanada
DOI:10.1021/jo101347f
日期:2010.11.19
By using platinum(II) chloride as a Lewis acid catalyst, concise and efficient syntheses of indole carbamates, 1,2-dihydroisoquinoline carbamates, macrocyclic indole carbamates, indole ureas, and indole phosphoranes have been achieved via tandem Hofmann-type rearrangement of 2-alkynylbenzamides and 2-alkynylbenzylamides, nucleophilic addition of alcohols and amines to the isocyanate intermediates,
Copper-Catalyzed Tandem Amide<i>N</i>-Arylation and Regioselective Cyclization of 2-Alkynylbenzamides
作者:Hideki Minami、Takuya Sueda、Noriko Okamoto、Yoshihisa Miwa、Minoru Ishikura、Reiko Yanada
DOI:10.1002/ejoc.201501330
日期:2016.1
stable 2-alkynylbenzamides was developed by using a tandem copper-catalyzed N-arylation and regioselective 6-endo-dig cyclization in the presence of diaryliodonium salts, a copper catalyst, and 2,6-di-tert-butylpyridine. The arylation occurred at the nitrogen atom rather than the oxygen atom of the amide group, the alkynyl carbon, or the benzene ring of the benzamide. Cyclization occurred through a preferential