4-Toluenesulfonyl chloride → HCID 23436211, compound

Participants

Reaction Steps

4-Hydroxymethyl-2-methylimidazole (0.7 g, 6.25 mmol), prepared as in Example 180A, and p-toluenesulfonylchloride (1.2 g, 6.25 mmol) were suspended in 5 mL of distilled water and 3 mL of THF. Sodium hydroxide (1N) was added to maintain a pH of 9 over a period of 3 hours. The reaction mixture was extracted with ethyl acetate (3×50 mL). The extracts were combined, dried over magnesium sulfate, concentrated and crystallized from ethyl acetate, collected by vacuum filtration and dried to give 4-hydroxymethyl-2-methyl-1-p-toluenesulfonylimidazole (0.5 g, 35%) as a white solid; m.p. 140-143°; 1H NMR (300 MHz, CDCl3) δ 7.78 (d, 8.25 2H), 7.36 (d, J=8.25 Hz, 2H), 7.33 (s, 1H), 4.49 (s, 2H), 2.50 (s, 3H), 2.45 (s, 3H); 13C NMR (75 MHz, CDCl3) δ 146.38, 140.96, 134.85, 130.51, 127.57, 116.05, 57.37, 21.84, 15.02; MS m/e calc'd: 266.0725, found: 266.0714.

Provenance & Evidence