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1,3-Dipolar cycloadditions of diazoalkanes with thiete 1,1-dioxide

✍ Scribed by De Benedetti, Pier G.; De Micheli, Carlo; Gandolfi, Remo; Gariboldi, Pierluigi; Rastelli, Augusto

Book ID
125943651
Publisher
American Chemical Society
Year
1980
Tongue
English
Weight
624 KB
Volume
45
Category
Article
ISSN
0022-3263

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The 3-methylenecephams underwent I .3-dipolar cycloaddition reactions with diazomethane to give spiropyrazolinocephams in a completely stereo-and regioselective manner. Thermal breakdown of these I-pyrazolines led to spirocyclopropane and vinyl derivatives.