First Novozym 435 lipase-catalyzed Morita-Baylis-Hillman reaction in the presence of amides.

Enzyme and microbial technology (2016-02-02)
Xuemei Tian, Suoqin Zhang, Liangyu Zheng
ABSTRAKT

The first Novozym 435 lipase-catalyzed Morita-Baylis-Hillman (MBH) reaction with amides as co-catalyst was realized. Results showed that neither Novozym 435 nor amide can independently catalyze the reaction. This co-catalytic system that used a catalytic amount of Novozym 435 with a corresponding amount of amide was established and optimized. The MBH reaction strongly depended on the structure of aldehyde substrate, amide co-catalyst, and reaction additives. The optimized reaction yield (43.4%) was achieved in the Novozym 435-catalyzed MBH reaction of 2, 4-dinitrobenzaldehyde and cyclohexenone with isonicotinamide as co-catalyst and β-cyclodextrin as additive only in 2 days. Although enantioselectivity of Novozym 435 was not found, the results were still significant because an MBH reaction using lipase as biocatalyst was realized for the first time.

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Sigma-Aldrich
4-Fluorobenzaldehyde, 98%
Sigma-Aldrich
4-Chlorobenzaldehyde, 97%
Sigma-Aldrich
Picolinamide, 98%