The reaction between the complex (CO)5Cr![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
C[graphic omitted] 1 and aliphatic aldehydes bearing α-H atoms, in the presence of dimethylamine hydrochloride and potassium carbonate, leads directly to 1,3-dienes 3a-f; in one case the formation of the intermediate 5 can be demonstrated.
L. Lattuada, E. Licandro, S. Maiorana and A. Papagni, J. Chem. Soc., Chem. Commun., 1991, 437 DOI: 10.1039/C39910000437
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