Cycloaddition reactions of 2,4-diphenyl-3-methyl-1,3-oxazolium 5-oxide with 4-methylene-4,5-dihydroisoxazoles: 1H and 13C nuclear magnetic resonance stereochemical assignments of the products
- 1 January 1988
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 3,p. 423-425
- https://doi.org/10.1039/p29880000423
Abstract
Some 3-aryl-4-methylene-5-morpholino-4,5-dihydroisoxazoles (2) were treated with 2,4-diphenyl-3-methyl-1,3-oxazolium 5-oxide (1) to give corresponding cycloaddition products, namely spiro[isoxazolo-4,3′-pyrroles](3) and (4). The steric configuration of the spiro-derivatives has been assigned on the basis of 1H and 13C n.m.r. evidence.Keywords
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