Piperazine → HCID 9971655, compound

Participants

Reaction Steps

The process is performed as in Example 75, starting with 500 mg of 2-chloro-N-(6-chloro-1H-indazol-3-yl)acetamide, 15 cm3 of acetonitrile and 528 mg of piperazine. The reaction medium is refluxed for 1 hour and then concentrated to dryness under reduced pressure (2 kPa; 50° C.); the crude product is purified by chromatography under an argon pressure of 50 kPa, on a column of silica gel (particle size 40-60 μm; diameter 2.5 cm), eluting with a methylene chloride/methanol/aqueous ammonia mixture (90/10/1 by volume). The fractions containing the expected product are combined, concentrated under reduced pressure and then dried (90 Pa; 45° C.) to give 380 mg of N-(6-chloro-1H-indazol-3-yl)-1-piperazineacetamide in the form of a white foam.

Provenance & Evidence