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Zur Synthese von β-Alkyl-α-methylen-γ-butyrolactonen

✍ Scribed by Röder, Erhard ;Krauß, Hiltrud


Book ID
102903218
Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
633 KB
Volume
1992
Category
Article
ISSN
0947-3440

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✦ Synopsis


Synthesis of β‐Alkyl‐α‐methylene‐γ‐butyrolactones

The ylene 1 reacts with aldehydes to give 3‐alkylidenesuccinic acid monoethyl esters 2, which form β‐alkylidene‐γ‐butyrolactones 3 when treated with sodium diethyldihydroaluminate. Hydrogenation of the double bond leads to the β‐alkyl‐γ‐butyrolactones 4. The β‐alkyl‐α‐methylene‐γ‐butyrolactones 5 are obtained by Mannich reaction.


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