Monatshefte fur Chemie p. 1133 - 1142 (1993)
Update date:2022-07-30
Topics:
Kappe, C. Oliver
Wentrup, Curt
Kollenz, Gert
Various <2 + 4> hetero-Diels-Alder cycloaddition reactions of dipivaloylketene (2) with polarized multiple bond systems are described.Aldehydes and ketones react with 2 to furnish 1,3-dioxin-4-ones 7, imines and heterocumulenes (X=C=N) form 1,3-oxazin-4-o
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