| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5216185 | Tetrahedron | 2014 | 10 Pages |
Abstract
Chiral spiropyrazolinepenicillanates were obtained in a stereoselective fashion via 1,3-dipolar cycloaddition reactions of 6-alkylidenepenicillanates with diphenyldiazomethane, phenyldiazomethane, and diazomethane. Microwave-induced ring contraction of spiro-1-pyrazoline-β-lactams leading to chiral spirocyclopropylpenicillanates is also described.
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