Benzoic Acid → L-159913

참여 물질

반응 조건

반응 단계

A solution of 145 mg (1.18 mmole) of benzoic acid and 192 mg (1.18 mmole) of 1,1'-carbonyldiimidazole in 1 mL of THF was stirred under N2 at 55° C. for 2 hours. Then a solution of 157 mg (0.296 mmole) of 5-n-butyl-2,4-dihydro-4-[(2'-sulfamoylbiphenyl-4-yl)methyl]-2-[2-(trifluoromethyl)phenyl]-3H-1,2,4-triazol-3-one (from Example 16, Step C) and 133 mL (135 mg, 0.888 mmole) of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in 1 mL of THF was added dropwise. After being stirred overnight at 55° C., the mixture was partitioned between ethyl acetate and 5% citric acid (aqueous). The organic layer was washed with H2O and then with saturated NaCl solution. The ethyl acetate phase was then dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography of the residue as in Example 16, Step D, gave 159 mg (85%) of the title compound, homogeneous by TLC in 98:2 CH2Cl2 --MeOH and comparable in physical properties to the product made according to Example 16, Step D.

출처 및 근거