A novel ultrasound-assisted protocol has been devised for the highly chemoselective
esterification of tert-butyloxycarbonyl (Boc)-activated secondary carboxamides with alcohols. This study
highlights the catalytic versatility of PPL lipase, which extends beyond their traditional
hydrolytic functions to include synthetic applications like esterification and transesterification.
The research investigates the enzymatic esterification of protected amides with alcohols,
utilizing PPL lipase as a biocatalyst under ultrasound irradiation. This method can
achieve high reaction rates and selectivities under mild conditions.
Key words
esterification - PPL lipase - ultrasound-assisted - transition-metal-free