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The Preparation of Substituted 3,4-Dihydro-1H-2-benzopyran-1-ones from the Dianions of Ortho -Toluic Acids

โœ Scribed by Hildebran, Karen C.; Cordray, Tracy L.; Chan, Kam W.; Beam, Charles F.


Book ID
121478801
Publisher
Taylor and Francis Group
Year
1994
Tongue
English
Weight
437 KB
Volume
24
Category
Article
ISSN
0039-7911

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## Abstract A new synthetic route to 6โ€substitutedโ€imidazo[4,5โ€__c__]pyridinโ€2โ€ons from 4โ€aminopyridine has been investigated. 4โ€Aminopyridine protected as alkyl carbamates were nitrated with dinitrogen pentoxide to the corresponding methyl, __i__โ€propyl and __t__โ€butyl 3โ€nitropyridinโ€4โ€yl carbamat