Iodine → HCID 15337859, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-(4-benzyloxyphenoxy)benzo[b]thiophene (6.00 g, 18.1 mmol) in anhydrous tetrahydrofuran (100 mL) under N2 at -78° C. was added n-butyllithium (12.4 mL, 19.9 mmol, 1.6M in hexanes) dropwise via syringe. The solution turned from colorless to deep orange. After stirring for 20 minutes at -78° C., the lithio species was treated with I2 (5.03, 19.9 mmol), added dropwise via canula as a solution in 50 mL of anhydrous tetrahydrofuran. Upon completion of the addition, the reaction turned light yellow in color, and was allowed to slowly warm to room temperature. The reaction was quenched by the addition of 0.1N sodium sulfite solution (200 mL). The layers were separated and the aqueous extracted with ethyl acetate (2×150 mL). The organic layers were combined, dried (sodium sulfate), and concentrated in vacuo to give an oil that crystallized on standing. Recrystallization from hexanes/ethyl ether yielded 7.10 g (86%) of 2-iodo-3-(4-benzyloxyphenoxy)benzo[b]thiophene as a white crystalline powder. mp 87°-92° C. 1H NMR (CDCl3) d 7.72 (d, J=8.1 Hz, 1H), 7.47-7.20 (m, 8H), 6.89 (s, 4H), 5.01 (s, 2H). Anal. Calcd. for C21H15O2SI: C, 55.03; H, 3.30. Found: C, 55.29; H, 3.31.

Provenance & Evidence