Trifluoroacetic acid → HCID 53693452, compound

Participants

Reaction Steps

Trifluoroacetic acid (1.06 ml, 13.9 mmol) was added under nitrogen to a stirred suspension of sodium cyanate (1.00 g, 15.2 mmol) in a solution of the hydrazine (Intermediate 36; 1.00 g, 4.8 mmol) in dry toluene (30 ml). The mixture was stirred for ca. 2 h, causing formation of a viscous insoluble gum. Saturated aqueous sodium hydrogen carbonate (25 ml) was added (causing effervescence and dissolution of the gum) and the mixture was extracted with ethyl acetate (3×75 ml). The combined extracts were washed with saturated brine (50 ml) dried and evaporated to afford a light yellow solid which was triturated with hexane/ethyl acetate (1:1) to give the title compound as a white powder (0.92 g, 76%), m.p. 139°-141°.

Provenance & Evidence