2-Methyl-2-butene → HCID 67520549, compound

Participants

Reaction Steps

A freshly prepared solution of sodium chlorite (16.8 g, 186 mmol) in a 20% aqueous solution of sodium dihydrogen phosphate (155 mL) was added to a solution of 6-(benzyloxy)-4-(dibenzylamino)-1-naphthaldehyde (prepared by the method described in WO 03/014064) (8.50 g, 18.6 mmol) and 2-methyl-2-butene (27.2 g, 41 mL, 387 mmol) in t-butanol (186 mL). The mixture was stirred vigorously at RT for 1 h. The reaction mixture was diluted with a saturated aqueous solution of sodium sulfite (150 mL) and stirred for 15 min. The mixture was concentrated and then partitioned between CH2Cl2 and water. The aqueous phase was separated and extracted with CH2Cl2. The combined organic phases were washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated to afford a tan solid. This material was purified via column chromatography on silica gel (eluting with 0-50% EtOAc-hexane) to afford 6-(benzyloxy)-4-(dibenzylamino)-1-naphthoic acid as an orange brown solid. MS (ESI, pos. ion) m/z: 474.1 (M+H). Mass Calc'd for C32H27NO3: 473.

Provenance & Evidence