polyoxyethylene (10) cetyl ether; n-octyl beta-D-glucopyranoside; subtilisin Carlsberg; sodium carbonate in tetrahydrofuran T=20°C; 17 h; Title compound not separated from byproducts;

ytterbium(III) triflate T=160°C; 6 h; Neat (no solvent)Inert atmosphere;

aluminium trichloride T=155°C;