HCID 11550475, compound → HCID 66629483, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 1 (198 mg, 1.25 mmol) in NMP (2.5 mL) and a solution of 2 (300 mg, 1.25 mmol) in NMP (3.5 mL) were combined in a flask fitted with a Hickman still. The mixture was heated at 120° C. and stirred for 2 h. Then FeCl3.6H2O (17 mg, 63 μmol) was added and oxygen was bubbled through the mixture with continued heating and stirring for 20 h. The cooled reaction mixture was diluted with ethyl acetate. The organic solution was washed with water and brine. The organic layer was dried (Na2SO4), filtered, concentrated, and chromatographed (silica, CH2Cl2 w/ethyl acetate gradient of 0-5%). Fractions containing the desired compound were concentrated to give a reddish solid, which was chromatographed over a short plug of alumina (CH2Cl2 w/ethyl acetate gradient of 10-100%) yielding a colorless solid (268 mg, 57%): mp 264-266° C.; 1H NMR (d6-acetone) δ 2.57 (d, J=7.2 Hz, 6H), 4.88-5.11 (m, 6H), 5.56-5.69 (m, 3H), 7.65 (d, J=8.8 Hz, 2H), 8.26 (d, J=8.8 Hz, 2H), 12.89 (brs, 1H); 13C NMR (d6-acetone) δ 41.6, 44.0, 108.2, 116.9, 117.7, 126.4, 127.3, 128.0, 134.4, 150.2; FABMS obsd 379.1909, calcd 379.1923 (C25H22N4).

Provenance & Evidence