Dichloromethane → HCID 66642781, compound

Participants

Reaction Steps

A solution of boron tribromide (1 M in dichloromethane, 1.3 mL, 1.3 mmol) was added to a solution of 5,6-dimethyl-4-(4′-methoxy-3′-iso-propylphenoxy)indolephosphonic acid (100 mg, 0.26 mmol) in dichloromethane (10 mL) at −78° C. The ice bath was removed and the reaction mixture was warmed to rt. After stirring at rt overnight, the reaction mixture was quenched with ice, diluted with ethyl acetate and washed with water then brine, dried over sodium sulfate and concentrated under reduced pressure to give the title compound (86.3 mg, 80%): 1H NMR (300 MHz, CD3OD) δ 7.18 (s, 1H), 6.97 (d, J=3.0 Hz, 1H), 6.60 (s, 1H), 6.57 (d, J=9.0 Hz, 1H), 6.26 (dd, J=9.0, 3.0 Hz, 1H), 3.22 (heptuplet, J=6.9 Hz, 1H), 2.28 (s, 3H), 2.18 (s, 3H), 1.12 (d, J=6.9 Hz, 6H); Anal. Calcd for (C19H22NO5P+1.5H2O+0.1 C3H6O): C, 56.79; H, 6.32; N, 3.43. Found: C, 56.61; H, 5.92; N, 3.22.

Provenance & Evidence