Cyclodextrin glucanotransferase (CGTase) catalyzed synthesis of dodecyl glucooligosides by transglycosylation using α-cyclodextrin or starch

► Dodecyl glucooligosides can be synthesized using CGTase from Bacillus macerans. ► α-Cyclodextrin and soluble starch were successfully used as glycosyl donors. ► Disproportionation prominent when soluble starch acts as donor substrate. ► 78% conversion of the acceptor substrate C12G1 into dodecyl glucooligosides. ► 93% of C12G2 could be transformed into dodecyl glucooligosides.