Butyric acid, from carbohydrates ester

Proteases can also catalyse the esterification of carbohydrates. Thus 1 -O-butyl sucrose was prepared Irom sucrose and trichloroethyl butyrate with subtilisin in anhydrous DMF [14]. This strategy has heen extended to commercially available insoluble crosslinked forms of subtilisin to prepare regiospecifically I -O-acylsucroses from fatty acids and vinyl esters in high yields [15]. 

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