K. Matta, J. Barlow
Nov 1, 1976
Citations
0
Influential Citations
17
Citations
Journal
Carbohydrate research
Abstract
The use of the chloroacetyl group as a protecting group has been studied for a 2-methylglyco-[2',1':4,5]-2-oxazoline. The reaction of chloroacetyl chloride or chloroacetic anhydride with 2-acetamido-1,3,4-tri-O-acetyl-2-deoxy-beta-D-glucopyranose provided 2-acetamido-1,3,4-tri-O-acetyl-6-O-(chloroacetyl)-2-deoxy-beta-D-glucopyranose which, on treatment with anhydrous ferric chloride in dichloromethane, produced the desired oxazoline. The glycosylating capability of the oxazoline has been investigated with aglycon hydroxides, to give the corresponding 2-acetamido-2-deoxy-beta-D-glucopyranosides. The chloroacetyl group can be selectively removed by treatment with thiourea, and migration of O-acetyl groups was not observed under these conditions.