Abstract

By using of precise catalytic amount of N-methylpyrrolidine (5 mol %) and Ba(OH) 2 (1.5 mol %) in H 2O/CH 3OH 5/1 or CH 3OH/CH 2Cl 2 3/1 solvent mixtures at T=0 °C a Morita–Baylis–Hillman derivatives could be obtained in good to excellent yield from 2-cyclopenten-1-one, 2-cyclohexen-1-one and formaldehyde and diverse aryl aldehydes after suitable reaction time.

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