Trifluoroacetic acid → HCID 19076546, compound

Participants

Reaction Steps

A solution of 1.17 g of the compound obtained in EXAMPLE 222 in 7.5 ml of DCM is cooled to +4° C., 15 ml of TFA are added and the reaction mixture is stirred for 3 hours 15 minutes at +4° C. It is concentrated under vacuum, the residue is taken up with DCM and the solvent is evaporated off under vacuum, this operation being repeated twice. The residue is taken up with AcOEt, the organic phase is washed with water and with a saturated solution of NaCl and dried over sodium sulfate and the solvent is evaporated off under vacuum to give 0.6 g of the expected product after trituration in iso ether and then crystallization from a DCM/iso ether mixture. M.p.=133° C.

Provenance & Evidence