Glucopyranosylamine → N-(2-Chloroethyl)-N'-beta-D-glucopyranosyl-N-nitrosourea

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Reaction Steps

3.28 g (12 mmol) of o-nitrophenyl N-(2-chloroethyl)-N-nitrosocarbamate is dissolved in a mixture of 10 ml anhydrous dimethylformamide and 10 ml anhydrous ethanol, and to this solution is added little by little 1.79 g (10 mmol) of 1-amino-1-deoxy-β-D-glucopyranose powder, while stirring, at 5°-10° C. over 10 minutes. The resultant mixture is, after adding 5 ml of anhydrous dimethylformamide thereto, stirred further at 10° C. for 5 hours, and the thus reacted solution is concentrated at 40° C. and below, under reduced pressure. The crystalline residue obtained is washed with anhydrous ethyl ether and then with acetone, dried under reduced pressure, and recrystallized from anhydrous ethanol-ethyl ether (1:5) to give 2.47 g of 3-(β-D-glucopyranosyl)-1-(2-chloroethyl)-1-nitrosourea. Yield 78.7%. mp 77°-78° C. (decomp.). [α]D25 -10.3° (C 1.0, water). Analysis for C9H16N3O7Cl (MW 313.69):

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