Liebigs Annalen p. 441 - 445 (1997)
Update date:2022-08-03
Topics:
Risitano, Francesco
Grassi, Giovanni
Bruno, Giuseppe
Nicolo, Francesco
The reactions of (arylmethylene)isoxazol-5-ones 1 with pyridinium ylides 2 lead to the diastereoselective formation of olates 4. The reasons for the favored Michael addition and the unsuccessful subsequent cyclization to fused O-heterocycles are discussed on the basis of X-ray analysis as well as 1H-NMR and chemical evidences. VCH Verlagsgesellschaft mbH, 1997.
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