Acetic Acid → HCID 56847160, compound

HRID 1261736Notes

Reaction equation

HRID 1261736 reaction equation
[CH2:1]([S:5]([N:8]1[CH2:17][CH2:16][C:15]2[N:14]=[C:13]([C:18]([O:20]C)=O)[CH:12]=[CH:11][C:10]=2[CH2:9]1)(=[O:7])=[O:6])[CH2:2][CH2:3][CH3:4].[K].[NH2:23][OH:24].C(O)(=O)C>CO>[CH2:1]([S:5]([N:8]1[CH2:17][CH2:16][C:15]2[N:14]=[C:13]([C:18]([NH:23][OH:24])=[O:20])[CH:12]=[CH:11][C:10]=2[CH2:9]1)(=[O:6])=[O:7])[CH2:2][CH2:3][CH3:4]

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 66778571HCID 66778571, compoundHCID 86662665HCID 86662665, compound

Product 1

HCID 56847160HCID 56847160, compoundYield 28.3%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a microwave vial containing methyl 6-(butylsulfonyl)-5,6,7,8-tetrahydro-1,6-naphthyridine-2-carboxylate was added MeOH (1 mL) and hydroxylamine potassium salt (1 mL, 1.76 mmol, 1.76 M in MeOH). The solution was shaken at rt for 1 h, then acetic acid (0.102 mL, 1.8 mmol) was added to quench excess base. The solvent was then concentrated. To the resulting residue was added DMSO (1.2 mL) and after filtration, the solution underwent purification via prep-HPLC to give 6-(butylsulfonyl)-N-hydroxy-5,6,7,8-tetrahydro-1,6-naphthyridine-2-carboxamide (13.3 mg, 28.3%). LC-MS: (FA) ES+ 314; 1H NMR (Methanol-d4, 300 MHz) δ 7.97 (d, J=8.1 Hz, 1H), 7.76 (d, J=7.9 Hz, 1 H), 4.59 (s, 2H), 3.70 (t, J=6.0 Hz, 2H), 3.13 (m, 4H), 1.77 (m, 2H), 1.47 (m, 2H), 0.95 (t, J=7.3 Hz, 3H).

Workup

  1. customto quench excess base
  2. concentrationThe solvent was then concentrated
  3. additionTo the resulting residue was added DMSO (1.2 mL)
  4. filtrationafter filtration
  5. customthe solution underwent purification via prep-HPLC

Sources & evidence

ORD record
ord-416a12599f764655b1a209bab4370858
Source dataset
uspto-grants-2013_06
Patent number
US08471026B2

Reaction notes

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