Highly Selective Formation of β‐Glycosides of N‐Acetylglucosamine Using Catalytic Iron(III) Triflate

Efficient and highly selective glycosylation reactions of peracetylated β‐ D ‐ N ‐acetylglucosamine are described using catalytic iron(III) triflate and 2,4,6‐tri‐ tert ‐butylpyrimidine (TTBP) under microwave conditions. We have demonstrated that the formation of β‐(1→6) and β‐(1→3) linked disaccharides are obtained in high yields in the presence ofvarious protecting groups.