In this work, the synthesis of various α-glucosyl derivatives of (‒)-epigallocatechin gallate (EGCG), the predominant catechin in green tea, was performed in water at 50 °C by a transglycosylation reaction catalyzed by cyclodextrin glycosyltransferase (CGTase) from Thermoanaerobacter
sp. The molecular weight of reaction products was determined by HPLC-MS. Using hydrolyzed potato starch as glucosyl donor, two main monoglucosides were obtained with conversion yields of 58% and 13%, respectively.
“Efficient α-glucosylation of epigallocatechin gallate catalyzed by cyclodextrin glucanotransferase from Thermoanaerobacter sp.”.
J.L. Gonzalez-Alfonso, L. Leemans, A. Poveda, J. Jimenez-Barbero, A.O. Ballesteros and F.J. Plou. Journal of Agricultural and Food Chemistry
66, 7402–7408 (2018), doi:10.1021/acs.jafc.8b02143