Patent ID: 8470986

Claim:
A process for producing an oxazoline derivative of the general formula (3) in an aqueous solvent: wherein R 1 is an alkyl group; R 2 , R 3 , and R 4 may be identical or different from one another, R 2 and R 3 are each independently selected from the group consisting of a hydrogen atom, a hydroxyl group, a hydroxymethyl group, an acetamido group, a carboxy group, a sulfuric acid residue, a phosphoric acid residue, and a sugar residue, and R 4 is selected from the group consisting of a hydrogen atom, a hydroxyl group, a hydroxymethyl group, an acetamido group, a carboxy group, a sulfuric acid residue, a phosphoric acid residue, a sugar residue, and a hydroxymethyl group modified by sulfation or phosphorylation, which comprises treating a sugar, with a hemiacetalic hydroxyl group and an amido group, of the general formula (1): wherein R 1 , R 2 , R 3 , and R 4 have the same meanings as defined above, with a haloformamidinium derivative of the general formula (2): wherein R 5 , R 6 , R 7 , and R 8 , which may be identical or different one another, are each independently selected from the group consisting of an unsubstituted or optionally substituted alkyl group, an unsubstituted or optionally substituted alkenyl group, and an unsubstituted or optionally substituted aryl group; R 5 taken together with R 7 , or R 6 taken together with R 8 , may form a ring; or R 5 taken together with R 6 , or R 7 taken together with R 8 , may form a ring; X is a halogen atom; and Y − is an anion.