反应详情

To a stirred solution of trans-[4-(3,4,5-trimethyl-pyrazol-1-ylmethyl)-cyclohexyl]-carbamic acid tert-butyl ester (step 2) (215 mg, 0.669 mmol) in methanol (3 mL) at room temp is added a solution of 4M HCl in dioxane (3 mL). The mixture is stirred at room temp for 1 hour and then concentrated in vacuo. The resulting gum is dried under vacuum overnight to afford the title compound which is used without further purification. 1H NMR (400 MHz, CDCl3) δ 8.16 (3H, br s), 4.10 (2H, d), 2.90 (1H, m), 2.29 (3H, s), 2.27 (3H, s), 2.01-1.90 (5H, m including 3H, s), 1.83 (1H, s), 1.54 (2H, m), 1.30 (2H, m), 1.12 (2H, m). (NMR shows contamination with side products and solvents.)

1. concentrationconcentrated in vacuo
2. customThe resulting gum is dried under vacuum overnight