Journal
MOLECULES
Volume 25, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/molecules25184059
Keywords
pyridinium ylide; indolizine; domino reaction; fluorescence
Funding
- RFBR [18-33-20101]
- Ministry of Science and Higher Education of the Russian Federation [075-03-2020-223 (FSSF-2020-0017)]
- RUDN University Program 5-100
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Pyridinium ylides are well recognized as dipoles for cycloaddition reactions. In its turn, the microwave-assisted interaction of N-(cyanomethyl)-2-alkylpyridinium salts with enaminones unexpectedly proceeds as a domino sequence of cycloisomerization and cyclocondensation reactions, instead of a 1,3-dipolar cycloaddition. The reaction takes place in the presence of sodium acetate as base and employs benign solvents. The optical properties of the resulting pyrido[2,3-b]indolizines were studied, showing green light emission with high fluorescence quantum yields.
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