HCID 21923091, compound → HCID 178446122, compound

Participants

Reaction Steps

The operation is carried out as in Stage 3 of Example 3 starting from 160 mg of the product obtained in Stage 1 above and 456 mg of trans-1,4-diaminocyclohexane and the reaction medium is taken to a temperature of 140 to 150° C. for 4 hours then cooled down to 70–80° C. and diluted with 20 ml of water/ethyl acetate in a proportion of 50/50 and left to settle, followed by washing with 10 ml of water and 5 ml of an aqueous solution of sodium chloride, drying and evaporating to dryness. After purification on silica eluting with methanol/ammonium hydroxide (NH4OH) in a proportion of 98/2 and salification with 1.4 N hydrochloric acid in ethanol, 149 mg of expected product is obtained in the form of crystals.

Provenance & Evidence