Benzaldehyde → methyl 3-[(2E)-2-benzylidenehydrazinyl]thiophene-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

A solution of methyl 3-hydrazinothiophene-2-carboxylate (Maybridge technical grade, 2.0 g, 0.11 mol) in ethanol (250 mL) at 25° C. was reacted with a solution of benzaldehyde (12.32 g, 0.11 mol) in ethanol (100 mL). The mixture was stirred at 25° C. for 1.5 hours and concentrated to yield 30 g of a white solid. HPLC/MS show a single peak with retention time of 2.35 min. and a M+1 peak of 261. 1H NMR (300 MHz, CDCl3) δ ppm 3.85 (s, 3 H) 7.35 (m, 4 H) 7.64 (dd, J=8.09, 1.47 Hz, 2 H) 7.77 (s, 1 H) 10.10 (s, 1 H).

Provenance & Evidence