Hydrochloric Acid → HCID 9933004, compound

Participants

Reaction Steps

(±)-[2R*[1S*,5S*(S*)]]+[2R*[1S*,5R*(R*)]]-α,α'[iminobis(methylene)]bis[6-fluoro-3,4-dihydro-2H-1-benzopyran-2-methanol] (142 g) was converted into the hydrochloric acid salt in ethanol (1000 ml). The crystals were filtered off and crystallized from ethanol. The second fraction of the crystallization was recrystallized from ethanol, yielding 10.3 g (6.6%) of (±)-[2R*[1S*,5S*(S*)]]-α,α'[iminobis(methylene)]bis[6-fluoro-3,4-dihydro-2H-1-benzopyran-2-methanol]hydrochloride; mp. 224.9° C. nebivolol hydrochloride (crystalline compound 1).

Provenance & Evidence