Epichlorohydrin → 1-chloro-3-(3-phenyl-3,4-dihydro-2H-1-benzopyrane-7-yloxy)-2-propanol

Participants

Reaction Steps

11.3 g 3-phenyl-7-hydroxy-3,4-dihydro-2H-1-benzopyrane, 0.1 cm3 piperidine and 22 cm3 1-chloro-2,3-epoxypropane were stirred at 90° C. for 9 hours. The solution was evaporated under reduced pressure, then twice 60-60 cm3 of benzene were distilled off from the residue, it was dissolved in 50 cm3 of tetrahydrofurane and into the solution hydrochloric gas was introduced for 5 minutes. The solution was evaporated after an hour's standing, and the residue was crystallized from aceton. 10 g 1-chloro-3-(3-phenyl-3,4-dihydro-2H-1-benzopyrane-7-yloxy)-2-propanol (m.p. 74°-76° C.) was obtained.

Provenance & Evidence