1,1'-(Chlorophenylmethylene)bis(4-methoxybenzene) → HCID 86761230, compound

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Reaction Steps

The above-obtained 6-O-diphenylcarbamoyl-2-N-methylthiocarbamoyldeoxyguanosine (400 mg, 0.744 mmol) was azeotroped with anhydrous pyridine three times and dissolved in anhydrous pyridine (8.0 mL), and 4,4′-dimethoxytrityl chloride (278 mg, 0.818 mmol) was added thereto. The mixture was stirred at room temperature for 3 hours, and then sodium bicarbonate water (3 mL) was added thereto to terminate the reaction. The reaction solution was extracted with ethyl acetate (150 mL)/sodium bicarbonate water (120 mL) once and with ethyl acetate (150 mL)/brine (100 mL) twice. Then, the organic layer was dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (N60: spherical neutral silica gel) with methanol/3% to 4% chloroform containing 1% triethylamine to give 5′-O-(4,4′-dimethoxytrityl)-6-O-diphenylcarbamoyl-2-N-methylthiocarbamoyldeoxyguanosine (570 mg, 78%).

Provenance & Evidence