Cycloaddition of delta2-thiazolines and acyl ketenes under acidic conditions results in bicyclic 1,3-oxazinones and not 6-acylpenams as earlier reported.
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P. Domaille | D. Boström | Nils Pemberton | F. Almqvist | H. Emtenäs | M. D. Levin | Zuolin Zhu | W. A. Greenberg