反应详情

A 50 mL round-bottom flasks was charged with 4-(1-benzyltetrazol-5-ylmethyl)-2-(2-methylphenyl)benzoic acid (205.1 mg, 0.52 mmol), 1-(3-dimethylaminopropyl-3-ethylcarbodiimide hydrochloride (EDAC) (110.1 mg, 0.0.572 mmol), L-methionine methyl ester hydrochloride (135.0 mg, 0.676 mmol), 1-hydroxybenzotriazole (78.6 mg, 0.572 mmol) and dmf (3 mL). The reagents were stirred until completely dissolved and then triethylamine (0.14 mL, 0.936mmol) was added. The reaction was stirred about 48 h until no starting material was present. Water (2 mL) and EtOAc (2 mL) were added to dissolve the precipitate. The mixture was extracted with EtOAc (3×10 mL). The combined organic layers were washed with 2 M Na2CO3 (10 mL), water (10 mL) and brine (10 mL), dried over MgSO4, filtered and concentrated under vacuum. Yield: 273.0 mg , yellow solid. 1H NMR (δ, CDCl3): 8.0 (2H), 7.0-7.4 (10H), 5.85 (1H), 5.7 (2H), 4.6 (1H), 4.3 (2H), 3.65 (3H), 1.95-2.2 (6H), 1.5-1.9 (4H).

1. dissolutionuntil completely dissolved
2. stirringThe reaction was stirred about 48 h until no starting material
3. dissolutionto dissolve the precipitate
4. extractionThe mixture was extracted with EtOAc (3×10 mL)
5. washThe combined organic layers were washed with 2 M Na2CO3 (10 mL), water (10 mL) and brine (10 mL)
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated under vacuum