Triethylamine → Ethyl 2-(1-methyl-2-(thiophen-2-ylmethylcarbamoyl)hydrazinyl)acetate

Participants

Reaction Steps

To the solution of 4-nitrophenyl thiophen-2-ylmethylcarbamate (Compound XII-1) 3.14 g (11 mmol) in dichloromethane 20 ml, ethyl 2-(1-methylhydrazinyl)acetate (Compound XV-2) 2.98 g (22.6 mmol) and triethylamine 2.36 ml (17 mmol) was added at 0° C. and stirred at additional 4.5 hours. The reaction mixture was diluted with ethyl acetate 100 ml and washed with water 10 ml and brine 75 ml. The organic phase was dried with magnesium sulfate and filtered. The filtrate was concentrated in vacuo. The residue was submitted to silcagel chromatography to obtain the title compound 1.38 g (45%).

Provenance & Evidence