Trifluoroacetic acid → HCID 54704658, compound
Reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:23]=[CH:24][C:25]=1[Cl:26])[CH2:5][N:6]([CH3:22])[C:7]([C:9]1[CH2:10][N:11]([CH2:16][CH:17](OC)OC)[C:12](=[O:15])[C:13]=1[OH:14])=[O:8].FC(F)(F)C(O)=O.[N:34]1[CH:39]=[CH:38][C:37]([N:40]2[CH2:45][CH2:44][NH:43][CH2:42][CH2:41]2)=[CH:36][CH:35]=1.C([BH3-])#N.[Na+]>C(#N)C.O>[Cl:1][C:2]1[CH:3]=[C:4]([CH:23]=[CH:24][C:25]=1[Cl:26])[CH2:5][N:6]([CH3:22])[C:7]([C:9]1[CH2:10][N:11]([CH2:16][CH2:17][N:43]2[CH2:44][CH2:45][N:40]([C:37]3[CH:38]=[CH:39][N:34]=[CH:35][CH:36]=3)[CH2:41][CH2:42]2)[C:12](=[O:15])[C:13]=1[OH:14])=[O:8]Participants
Procedure
A solution of 1-(2,2-dimethoxy-ethyl)-4-hydroxy-5-oxo-2,5-dihydro-1H-pyrrole-3-carboxylic acid (3,4-dichloro-benzyl)-methyl-amide (0.29 g, 0.71 mmol) in acetonitrile/water (10 mL, 2.5:1) was stirred with trifluoroacetic acid (1 mL) overnight at room temp. The mixture was concentrated then dissolved in MeOH (3 mL). 1-(4-pyridyl)-piperazine (0.42 g, 2.6 mmol) was added and the resulting mixture was stirred at room temp 30 min. Sodium cyanoborohydride (0.013 g, 0.2 mmol) was added and the mixture was stirred an additional 5 h at room temp. The crude product was purified by preparative HPLC (YMC Combiprep ODS-A, 30 mm×50 mm, MeOH/H2O/0.1% TFA) to yield the title compound as an amber foam (0.0042 g, 12% yield). HRMS (M+H) calcd for C24H28N5Cl2O3: 504.15693; found: 504.1564.
Workup
- concentrationThe mixture was concentrated
- dissolutionthen dissolved in MeOH (3 mL)
- stirringthe mixture was stirred an additional 5 h at room temp
- customThe crude product was purified by preparative HPLC (YMC Combiprep ODS-A, 30 mm×50 mm, MeOH/H2O/0.1% TFA)
Sources & evidence
- ORD record
- ord-9250a01aac7f468f9e57123b43c7905b
- Source dataset
- uspto-grants-2006_09
- Patent number
- US07109186B2
Reaction notes
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