Some transformations of N-ethoxycarbonylmethylpyridinium bromides with a pyridyl or 1,4-dihydropyridyl substituent at position 3 View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1997-02

AUTHORS

N. V. Makarova, A. Plotnietse, G. Tirzitis, I. Turovskii, G. Dubur

ABSTRACT

The direction of the reaction of derivatives of N-ethoxycarbonylmethylpyridinium bromide with chalcone in the presence of bases depends on the substituent at position 3 of the pyridine ring. In the presence of a pyridyl substituent a derivative of 2,3-dihydroindolizine is formed. In the case of a 1,4-dihydropyridyl substituent cycloaddition does not occur, and a Michael addition product (an acyclic betaine) is formed. The latter can be transformed into a derivative of indolizine only under the conditions of decarboxylation. More... »

PAGES

175-183

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02256759

DOI

http://dx.doi.org/10.1007/bf02256759

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1033598718


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