Diethyl Ether → 2-Hydroxy-3-(triphenylsilyl)-1-naphthaldehyde

Participants

Reaction Conditions

Reaction Steps

A solution of 16.1 mL of tert-BuLi 1.5 M in pentane (24.10 mmol) was added dropwise to a stirred solution of 6.02 g of (4-bromo-3-methoxy-2naphtyl)-triphenylsilane (12.05 mmol) in 50 mL of Et2O at −78° C. The reaction mixture was stirred during 1.5 h at a given temperature and 30 min at 0° C. followed by addition of 0.94 mL of DMF. The resultant mixture was stirred overnight at room temperature and diluted with 200 mL of water. The organic part was extracted with CH2Cl2 (3×50 mL). The combined organic extracts were dried over MgSO4. The resultant solution was transferred to a Schlenk flask under argon and a solution of 24.1 mL of BBr3 1M in CH2Cl2 (24.1 mmol) was added dropwise at −78° C. The reaction mixture was stirred overnight at room temperature, then carefully hydrolysed with 500 mL of water. The organic part was extracted with CH2Cl2 (3×50 mL). The combined organic extracts were dried over MgSO4, and evaporated. The crude residue was recrystallised from methanol and dried under vacuum to give 5.44 g of 1 (12.63 mmol) with a yield of 95%.

Provenance & Evidence