Buchner ring expansion
The Buchner ring expansion is a two-step organic C-C bond forming reaction used to access 7-membered rings. The first step involves formation of a carbene from ethyl diazoacetate, which cyclopropanates an aromatic ring. The ring expansion occurs in the second step, with an electrocyclic reaction opening the cyclopropane ring to form the 7-membered ring.
| Buchner ring expansion | |
|---|---|
| Named after | Eduard Buchner |
| Reaction type | Rearrangement reaction |
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