Dichloromethane → HCID 19105539, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 55 mg (0.26 mmol) of 2,4,4-trimethyl-6-ethynyl-thiochroman (Compound 55) and 70.5 mg (0.26 mmol) of ethyl 4-iodo benzoate (29) in 1.5 ml of distilled triethylamine was placed in a heavy walled tube. Argon was bubbled through the mixture for 20 minutes under slightly reduced pressure. To the mixture was added 18 mg (0.051 mmol) of bis triphenylphosphine palladium (II) chloride and 9.7 mg (0.051 mmol) of cuprous iodide. The tube was then sealed and the mixture was stirred at 55 degrees C. for 72 hours. The mixture was then cooled to room temperature. The reaction mixture was diluted wth CH2Cl2 and treated with a small amount of silica. The solvent was then removed in-vacuo and the residue was subjected to flash chromatography (silica; 1.5% EtOAc/Hexanes) to give the title compound as a white crystalline solid. PMR(CdCl3): 1.25 (3H, s), 1.35 (3H, d, J=6.6 Hz), 1.37-1.44 (6H, m), 1.75 (1H, t, J=13 Hz), 1.88 (1H, dd, J=13 Hz, 3.5 Hz), 3.40-3.50 (1H, m), 4.38 (2H, q, J=7Hz), 7.17 (1H, dd, J=8.1 Hz, 1.8 Hz), 7.26 (1H, d, J=1.5 Hz), 7.33 (1H, J=8.1 Hz), 7.55 (2H, d, J=8.4 Hz, 8.01 (2H, d, J=8.4 Hz).

Provenance & Evidence