反应详情

To a solution of 527.6 mg (1.75 mmol) of 2,2,4,4-tetramethyl-6-trimethylsilyl-ethynylthiochroman (Compound 73) in 4 ml of isopropanol was added, under argon, 4 ml of 1N KOH solution. The reaction mixture was stirred at room temperature for 20 h and the isopropanol was then removed under vacuum. The residue was extracted with ether and the combined ether extracts were washed successively with water and saturated NaCl solution and then dried (MgSO4) The solvent was removed in vacuo to give the title compound as a yellow oil. PMR (CDCl3): δ 1.34 (6H, s), 1.37 (6H, s), 1.91 (2H, s), 2.99 (1H, s), 7.17 (1H, dd, J~8.1 Hz, 1.8 Hz), 7.26 (1H, d, J~1.8 Hz), 7.30 (1H, d, J~8.1 Hz). MS exact mass, m/e 230.1122 (calcd. for C15H18S, 230.1129)

1. customthe isopropanol was then removed under vacuum
2. extractionThe residue was extracted with ether
3. washthe combined ether extracts were washed successively with water and saturated NaCl solution
4. dry with materialdried (MgSO4) The solvent
5. customwas removed in vacuo