Sodium triacetoxyborohydride → Methyl (3S,4R)-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]-4-{[(2E)-3-(2,5-difluorophenyl)prop-2-en-1-yl]amino}piperidine-3-carboxylate

HRID 1644308Notes

Reaction equation

HRID 1644308 reaction equation
[NH2:1][C@@H:2]1[CH2:7][CH2:6][N:5]([CH2:8][CH2:9][N:10]2[C:19]3[C:14](=[C:15]([F:21])[CH:16]=[C:17]([F:20])[CH:18]=3)[CH:13]=[CH:12][C:11]2=[O:22])[CH2:4][C@@H:3]1[C:23]([O:25][CH3:26])=[O:24].[F:27][C:28]1[CH:33]=[CH:32][C:31]([F:34])=[CH:30][C:29]=1/[CH:35]=[CH:36]/[CH:37]=O.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl.CN(C)C=O>[F:21][C:15]1[CH:16]=[C:17]([F:20])[CH:18]=[C:19]2[C:14]=1[CH:13]=[CH:12][C:11](=[O:22])[N:10]2[CH2:9][CH2:8][N:5]1[CH2:6][CH2:7][C@@H:2]([NH:1][CH2:37]/[CH:36]=[CH:35]/[C:29]2[CH:30]=[C:31]([F:34])[CH:32]=[CH:33][C:28]=2[F:27])[C@@H:3]([C:23]([O:25][CH3:26])=[O:24])[CH2:4]1

Participants

5

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 66775175Methyl (3S,4R)-4-amino-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]piperidine-3-carboxylate2×HCID 86642138(2E)-3-(2,5-difluorophenyl)-2-propenal

Product 1

HCID 15983434Methyl (3S,4R)-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]-4-{[(2E)-3-(2,5-difluorophenyl)prop-2-en-1-yl]amino}piperidine-3-carboxylateYield 49%

Reagents, catalysts & solvents 1

HCID 22350042dichloromethane N,N-dimethylformamideSolvent

Procedure

Methyl(3S,4R)-4-amino-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]piperidine-3-carboxylate (Intermediate 34) (120 mg, 0.328 mmol), (2E)-3-(2,5-difluorophenyl)acrylaldehyde (FR 2872164) (54 mg, 0.328 mmol) and sodium triacetoxy borohydride (209 mg, 0.98 mmol) were reacted as described for Example 6. Chromatography on silica gel with dichloromethane/N,N-dimethylformamide (30:1) gave 83 mg (49%) of product as a colorless hard foam.

Sources & evidence

ORD record
ord-d0ac663c8db5411384112288e9e38867
Source dataset
uspto-grants-2012_02
Patent number
US08124602B2

Reaction notes

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