Diisopropylethylamine → (2S,5S)-ethyl 1-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-5-methylpyrrolidine-2-carboxylate
Reaction equation
[CH3:1][C@@H:2]1[NH:6][C@H:5]([C:7]([O:9][CH2:10][CH3:11])=[O:8])[CH2:4][CH2:3]1.C(O)(C(F)(F)F)=O.[CH3:19][O:20][C:21]([NH:23][C@@H:24]([CH:28]([CH3:30])[CH3:29])[C:25](O)=[O:26])=[O:22].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.CCOC(C)=O>[CH3:19][O:20][C:21]([NH:23][C@@H:24]([CH:28]([CH3:30])[CH3:29])[C:25]([N:6]1[C@@H:2]([CH3:1])[CH2:3][CH2:4][C@H:5]1[C:7]([O:9][CH2:10][CH3:11])=[O:8])=[O:26])=[O:22]Participants
7
Reactant 4
HCID 81531Diisopropylethylamine
HCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)
HCID 10942966(2S)-2-((methoxycarbonyl)amino)-3-methylbutanoic acid
HCID 66756570(2S,5S)-ethyl 5-methylpyrrolidine-2-carboxylate 2,2,2-trifluoroacetateProduct 1
Reagents, catalysts & solvents 2
Procedure
(2S,5S)-Ethyl 5-methylpyrrolidine-2-carboxylate-TFA (10.0 g, 39.3 mmol), (S)-2-(methoxycarbonylamino)-3-methylbutanoic acid (6.88 g, 39.3 mmol) and HATU (14.9 g, 39.3 mmol) were combined in DMF (100 mL) and DIPEA (15.0 mL, 86.5 mmol) was added. After stirring for 1 h at RT, the reaction mixture was diluted with EtOAc. The organic phase was washed successively with 10% HCl, saturated aqueous NaHCO3 and brine, then dried over MgSO4, filtered and concentrated under reduced pressure to afford (2S,5S)-ethyl 1-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-5-methylpyrrolidine-2-carboxylate. The crude material was carried on without further purification.
Workup
- washThe organic phase was washed successively with 10% HCl, saturated aqueous NaHCO3 and brine
- dry with materialdried over MgSO4
- filtrationfiltered
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-4771ff06110542d2b6c08b45be081683
- Source dataset
- uspto-grants-2016_01
- Patent number
- US09233974B2
Reaction notes
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