Tetrahedron Letters p. 2483 - 2486 (1990)
Update date:2022-09-26
Topics:
Baldwin, Jack E.
Pitlik, Janos
The 3-methylenecephams underwent 1,3-dipolar cycloaddition reactions with diazomethane to give spiropyrazolinocephams in a completely stereo- and regioselective manner. Thermal breakdown of these 1-pyrazolines led to spirocyclopropane and vinyl derivatives.
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