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2-Picoline, Chichibabin amination

Improved procedures for the Chichibabin amination of pyridine derivatives have been reported (83JAP(K)58-208266, 83USP4386209, 83USP4405790). A general method has been developed for the conversion of 2-aminopyri-dines into 2-pyridones via 2-cthoxycarbonyl-l-(2-pyridyl)pyridinium ions 15. The pyridinium ions 15 are easily made from the 2-aminopyridines 14 and the corresponding pyrylium salt 13. On treatment with aqueous sodium hydroxide, pyridinium ions 15 are converted into the l-(substituted-2-pyridyl-carbonyl)-2-pyridones 16, which are readily hydrolyzed to the 2-pyridones 17 and the picolinic acid 18 (83JCS(P1)2623). [Pg.203]

See other pages where 2-Picoline, Chichibabin amination is mentioned: [Pg.224]    [Pg.182]    [Pg.183]    [Pg.20]    [Pg.22]    [Pg.37]   
See also in sourсe #XX -- [ Pg.2 , Pg.27 , Pg.44 ]



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CHICHIBABIN Amination

Picolin

Picolinates

Picoline amination

Picolines

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