Trifluoroacetic acid → HCID 131721872, compound
Reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[N:7]([CH2:29][CH2:30][C:31]([O:33][CH2:34][CH3:35])=[O:32])[C:8]([C:10]1[CH:28]=[CH:27][C:13]2[N:14]([CH3:26])[C:15]([CH2:17][NH:18]C(OC(C)(C)C)=O)=[N:16][C:12]=2[CH:11]=1)=[O:9].[F:36][C:37]([F:42])([F:41])[C:38]([OH:40])=[O:39]>C(Cl)Cl>[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[N:7]([CH2:29][CH2:30][C:31]([O:33][CH2:34][CH3:35])=[O:32])[C:8]([C:10]1[CH:28]=[CH:27][C:13]2[N:14]([CH3:26])[C:15]([CH2:17][NH2:18])=[N:16][C:12]=2[CH:11]=1)=[O:9].[F:36][C:37]([F:42])([F:41])[C:38]([O-:40])=[O:39]Participants
4
Procedure
4.81 g (0.10 mol) of 1-methyl-2-(N-tert.butoxycarbonyl-aminomethyl)-benzimidazol-5-yl-carboxylic acid-N-(2-pyridyl)-N-(2-ethoxycarbonylethyl)-amide were dissolved in 25 ml of methylene chloride, mixed with 5 ml of trifluoroacetic acid and stirred for 5 hours at ambient temperature. Then the solvent was evaporated off and the residue was stirred with ether. The crystals thus formed were filtered off, washed with ether and dried. Yield: 3.15 g (68% of theory), C20H23N5O3 (381.4) Rf value: 0.18 (silica gel; methylene chloride/ethanol=9:1)