Ammonia → 2-Amino-4-fluoro-6-chlorodifluoromethoxy-1,3,5-triazine

Participants

Reaction Conditions

Reaction Steps

7.8 g (0.46 mol) of ammonia were passed over the course of 45 minutes into a stirred mixture of 50.0 g (0.23 mol) of 2,4-difluoro-6-chlorodifluoromethoxy-1,3,5-triazine and 150 ml of tetrahydrofuran at -70° C. The mixture was stirred for 2 hours at -70° C. and overnight while warming to 22° C. It was concentrated under reduced pressure, washed with water and dried. The product was then loaded in methylene chloride onto a silica gel column and eluted with the same solvent. Fractions 1-8 yielded 21.5 g (43.6% of theory) of 2-amino-4-fluoro-6-chlorodifluoromethoxy-1,3,5-triazine of melting point 131°-133° C. Washing with ethyl acetate then yielded in fractions 9-14 the less soluble 2,4-diamino-6-chlorodifluoromethoxy-1,3,5-triazine (11.2 g, 23% of theory) of melting point 114° C.

Provenance & Evidence