Sodium Bicarbonate → tert-butyl (1-(2-(7-fluoro-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

HRID 656870Notes

Reaction equation

HRID 656870 reaction equation
[F:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][C:8](=[O:15])[N:9]2[CH2:12][CH:13]=O)=[N:4][CH:3]=1.[NH:16]1[CH2:21][CH2:20][CH:19]([NH:22][C:23](=[O:29])[O:24][C:25]([CH3:28])([CH3:27])[CH3:26])[CH2:18][CH2:17]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C([O-])(O)=O.[Na+]>C(Cl)(Cl)Cl.CO>[F:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][C:8](=[O:15])[N:9]2[CH2:12][CH2:13][N:16]2[CH2:17][CH2:18][CH:19]([NH:22][C:23](=[O:29])[O:24][C:25]([CH3:27])([CH3:26])[CH3:28])[CH2:20][CH2:21]2)=[N:4][CH:3]=1

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 7238334-(N-Boc-amino)piperidineHCID 5049666Sodium triacetoxyborohydrideHCID 578152751,5-Naphthyridine-1(2H)-acetaldehyde, 7-fluoro-2-oxo-

Product 1

HCID 57815181tert-butyl (1-(2-(7-fluoro-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamateYield 77%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6212ChloroformSolvent

Procedure

A mixture of (7-fluoro-2-oxo-1,5-naphthyridin-1(2H)-yl)acetaldehyde (as the methyl hemiacetal) (1.09 g, 5.291 mmol) and 1,1-dimethylethyl 4-piperidinylcarbamate (1.06 g, 5.291 mmol) in chloroform (50 ml) and MeOH (2.5 ml) was stirred for 2 h before addition of NaBH(OAc)3 (3.37 g, 15.873 mmol). The reaction was stirred for 0.5 h before addition of sat. aq NaHCO3 (50 ml). The reaction was then extracted with 20% MeOH in DCM (3×200 ml). The combined organic phases were dried, evaporated and the crude residue purified by chromatography on silica gel using a 0-20% MeOH/DCM gradient to provide the desired compound (1.591 g, 77%).

Workup

  1. extractionThe reaction was then extracted with 20% MeOH in DCM (3×200 ml)
  2. customThe combined organic phases were dried
  3. customevaporated
  4. customthe crude residue purified by chromatography on silica gel using a 0-20% MeOH/DCM gradient

Sources & evidence

ORD record
ord-4d64d7f8c012437aad2fae454b003f52
Source dataset
uspto-grants-2011_12
Patent number
US08071592B2

Reaction notes

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