3,5-Dimethyl-1H-pyrazole-1-carboxamidine mononitrate → Anagrelide

Participants

Reaction Steps

A mixture of N-(2-amino-5,6-dichlorobenzyl)glycine ethyl ester (2.77 g, 0.01 mole) and 3,5-dimethylpyrazole-1-carboxamidine nitrate (2.01 g, 0.01 mole) in absolute ethanol (30 ml) was heated at reflux for 24 hours. The mixture was filtered and the product was washed successively with ethanol, acetone and ether to yield the title compound (1.02 g, 40%); identical (ir, nmr) with authentic material prepared by a prior art procedure.

Provenance & Evidence