ethyl 2-fluoroethanimidate;hydrochloride

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Ex-8h) 2.86 g of ethylfluoroacetimidate hydrochloride, 1 equivalent of 2-acetylamino-6-amino-4-hexynoic acid and 6.84 g of DBU are taken up in 200 mL absolute ethanol and stirred for 16 h at 20° C. under argon. Solvent is removed under vacuum and 100 mL water is added. This reaction mixture is filtered through acidic ion exchange column and the product is eluted with 10% pyridine/water. (±)-2-Acetylamino-6-(1-imino-2-fluoroethylamino)-hex-4-ynoic acid hydrochloride is obtained by removing the solvent under vacuum. Solvent is removed under vacuum and 100 mL water is added This reaction mixture is filtered through acidic ion exchange column the product is eluted with 10% pyridine/water