(Geminal, geminal) dienol diesters are obtained in one step by direct addition of carboxylic acids to terminal diynes in the presence of ruthenium catalysts such as RuCl2(PR3)(arene) or [Ru(µ-O2CH)(CO)2(PR3)]2 while the catalyst [PPh2(CH2)4PPh2]Ru[η3-CH2=C(Me)CH2]2 favours the formation of regioselective (Z,Z) dienol diesters.
A. Kabouche, Z. Kabouche, C. Bruneau and P. Henri Dixneuf, J. Chem. Res. (S), 1999, 249 DOI: 10.1039/A900145J
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