1,3-Dipolar character of six-membered aromatic rings. Part 56. The cycloadditions of acetylenes and 3-oxidopyridinium betaines
- 1 January 1988
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 4,p. 917-920
- https://doi.org/10.1039/p19880000917
Abstract
Cycloaddition of dimethyl acetylenedicarboxylate with a variety of 1-substituted 3-oxidopyridinium betaines yields novel furan cycloadducts. Methyl phenylpropiolate reacts similarly with the activated 1-[1′,2-di(p-nitrophenyl)vinyl]-3-oxidopyridinium betaine, but phenylacetylene adds to activated betaines to give azabicyclo[3.2.1]octene adducts.Keywords
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