反应详情

To a solution of 6.0 grams (0.01 mole) of (±)-1-S-hexadecyl-2-O-methyl-3-O-tritylthioglycerol in 100 milliliters of chloroform:methanol (3:1) was added 0.2 gram of p-toleunesulfonic acid and the reaction stirred at room temperature for 24 hours. The reaction mixture was neutralized with 1.0 gram of sodium bicarbonate and then extracted three times with 200 milliliter portions of water. The nonaqueous layer was separated and the solvent removed in vacuo to give the crude product as an oil. Silica gel chromatography (CHCl3 eluent) provided 3.1 grams (89%) of pure product as a semi-waxy solid. 1H-NMR (CDCl3): delta, 0.87(t, 3H, terminal methyl), 1.2-1.6[m, 28H, (CH2)14 ], 2.58 (m, 2H, --S--CH2), 2.62 (m, 2H, CH--CH2 --S--), 3.40(m, 1H, CH), 3.44(s, 3H, CH3 --O--), 3.75(m, 2H, CH2 --OH).

1. extractionextracted three times with 200 milliliter portions of water
2. customThe nonaqueous layer was separated
3. customthe solvent removed in vacuo
4. customto give the crude product as an oil