Pyridinium chloride → HCID 54417079, compound

Participants

Reaction Steps

Employing the procedure of Example 7, 5.0 g. (0.0134 mole) of the product from Example 11 was demethylated by treatment with 25 g. of pyridine hydrochloride for three hours in a 220° C. oil bath. Yellow crystals, obtained from ethyl acetate, were recrystallized from a mixture of 20 ml. of methanol and about 12 ml. of water to give 4.184 g. (91 percent) of the title compound as yellowish-brown crystals. Melting point 202.0°-202.5° C.

Provenance & Evidence