Tetrahedron Letters p. 6249 - 6252 (1988)
Update date:2022-08-03
Topics:
Tuloup, R.
Danion-Bougot, R.
Danion, D.
Pradere, J.P.
Benzeneseleninic anhydride allows oxidative ring opening of 2-pyrazolines to α,β-unsaturated carbonyl compounds.Thus, a pyrazoline ring may be used as a masking, a stereodirecting and a latent formyl group in the synthesis of 7-amino 4-formyl cephem from 1,3-6H-thiazine.
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(1987)
