One-Pot Approach to 2,3-Disubstituted-2,3-dihydro-4-quinolones from 2-Alkynylbenzamides
作者:Noriko Okamoto、Kei Takeda、Minoru Ishikura、Reiko Yanada
DOI:10.1021/jo201636a
日期:2011.11.4
3-disubstituted-2,3-dihydro-4-quinolones have been achieved via tandem Hofmann-type rearrangement of 2-alkynylbenzamides, nucleophilic addition of alcohols to the isocyanate intermediates, intermolecular [2+2]-cycloaddition with carbon–carbontriple bonds and aldehydes, and intramolecular aminocyclization of nitrogen of carbamates to the α,β-unsaturated ketones.
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
N‐Carboxylated‐2‐substituted Indoles and 2,3‐ Disubstituted‐2,3‐dihydro‐4‐quinolones from 2‐ Alkynylbenzamides
作者:Okamoto, Noriko、Takeda, Kei、Yanada, Reiko
DOI:10.15227/orgsyn.091.0027
日期:——
Concise One-Pot Tandem Synthesis of Indoles and Isoquinolines from Amides
作者:Noriko Okamoto、Yoshihisa Miwa、Hideki Minami、Kei Takeda、Reiko Yanada
DOI:10.1002/anie.200904960
日期:2009.12.14
Heterocyclic hot pot: Platinum(II)‐catalyzed syntheses of indoles and isoquinolines from isocyanates, which are derived from a Hofmann‐type rearrangement of amides using a hypervalent iodine reagent, are described. C2‐symmetric macrocyclic bis(indole)s can also be synthesized from transannulation of C2‐symmetric macrocyclic bis(alkyne carbamate) intermediates.