Sodium Bicarbonate → 1,1-Dimethylethyl {1-[2-(7-fluoro-5-oxido-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl]-4-piperidinyl}carbamate

HRID 657082Notes

Reaction equation

HRID 657082 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]([O-:16])[CH:3]=1.[NH:17]1[CH2:22][CH2:21][CH:20]([NH:23][C:24](=[O:30])[O:25][C:26]([CH3:29])([CH3:28])[CH3:27])[CH2:19][CH2:18]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C([O-])(O)=O.[Na+]>C(Cl)(Cl)Cl.CO.C(Cl)Cl>[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:17]2[CH2:18][CH2:19][CH:20]([NH:23][C:24](=[O:30])[O:25][C:26]([CH3:28])([CH3:27])[CH3:29])[CH2:21][CH2:22]2)=[N+:4]([O-:16])[CH:3]=1

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 7238334-(N-Boc-amino)piperidineHCID 5049666Sodium triacetoxyborohydrideHCID 86635348HCID 86635348, compound

Product 1

HCID 866353491,1-Dimethylethyl {1-[2-(7-fluoro-5-oxido-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl]-4-piperidinyl}carbamateYield 66%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 21584188Chloroform methanolSolvent

Procedure

A mixture of (7-fluoro-5-oxido-2-oxo-1,5-naphthyridin-1(2H)-yl)acetaldehyde (as the methyl hemiacetal) (327 mg, 1.286 mmol) and 1,1-dimethylethyl 4-piperidinylcarbamate (283 mg, 1.1 eq.) in chloroform:methanol (9:1 v:v) (5 ml) was stirred for 2 h before addition of NaBH(OAc)3 (481 mg, 2 eq.). The reaction was stirred for 0.5 h before addition of sat. aq NaHCO3 (5 ml). The reaction was then diluted with DCM (80 mL) and the organic phase was separated using a hydrophobic frit. The aqueous phase was extracted with DCM (2×50 mL) The combined organic extracts were dried, evaporated and the crude residue purified by chromatography on silica gel using a 0-20% (2M NH3 in MeOH)/DCM gradient to provide the desired compound (345 mg, 66%) as a tan foam.

Workup

  1. customthe organic phase was separated
  2. extractionThe aqueous phase was extracted with DCM (2×50 mL) The combined organic extracts
  3. customwere dried
  4. customevaporated
  5. customthe crude residue purified by chromatography on silica gel using a 0-20% (2M NH3 in MeOH)/DCM gradient

Sources & evidence

ORD record
ord-01faaf0649264aeba9b1badc77bd6ae4
Source dataset
uspto-grants-2011_12
Patent number
US08071592B2

Reaction notes

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