HCID 20266223, compound → HCID 13457046, compound

Participants

Reaction Steps

A solution of (7) (0.4 g, 1.1 mmol) in dimethylformamide (40 mL) was heated at 110° C. Simultaneously, oxygen was bubbled through it. After 2 hours, flow of oxygen was terminated and 2 mL of water was added. Upon cooling, the reaction mixture gave orange crystals of (8). ##STR12## These crystals were collected by filtration, washed with water and dried: yield 0.37 g (94% yield) of (8) with mp 222°-225° C. (lit. mp 223°-226° C.), 1H NMR (CDCl3) δ 13.36 (s, 1H), 8.08-7.22 (m, 4H), 4.07 (s, 3H), 3.30-2.40 (m, 4H), 2.27 (s, 3H), 2.27 (m, 1H), 2.0-1.4 (m, 2H), mass spectrum, m/z 350 (M+). Anal. Calcd. for C21H18O5 (350.35): C, 71.99; H, 5.18. Found: C, 71.70; H, 5.30.

Provenance & Evidence