Diisobutylaluminum hydride → 3-Methyl-4-(5-(1-phenylcyclopropyl)thiazolo[5,4-b]pyridine-2-yl)benzaldehyde

Participants

Reaction Conditions

Reaction Steps

DIBAL-H (11.0M in hexanes; 0.315 mL, 0.315 mmol) was added to a solution of 3-methyl-4-(5-(1-phenylcyclopropyl)thiazolo[5,4-b]pyridine-2-yl)benzonitrile (105.2 mg, 0.286 mmol) in CH2Cl2 (4.5 mL) at 25° C., and the resulting solution was stirred at 25° C. for 45 min. Additional DIBAL-H (1.0M in hexanes; 86 μL, 86 μmol) was then added, and the resulting solution was stirred at 25° C. for 30 min. Saturated aqueous Na/K tartrate solution (4.0 mL) was added, and the resulting mixture was vigorously stirred for 15 min, then partitioned between CH2Cl2 (40 mL) and saturated aqueous Na/K tartrate solution (10 mL). The organic layer was separated, and the aqueous layer was extracted with CH2Cl2. The combined organic extracts were dried over MgSO4, filtered, and concentrated in vacuo. Chromatographic purification of the residue (silica gel, 0-40% EtOAc/hexanes) provided 3-methyl-4-(5-(1-phenylcyclopropyl)thiazolo[5,4-b]pyridine-2-yl)benzaldehyde as a light-yellow foam. MS (ESI) m/z: Calculated: 370.1; Observed: 371.1 (M++1).

Provenance & Evidence