Methanol → (R)-3-Methyl-2-(3-oxopyrrolo [4,3,2-de][2,6]naphthyridin-4(1H,3H,5H)-yl)butanoic acid

HRID 1968284Notes

Reaction equation

HRID 1968284 reaction equation
[CH3:1][CH:2]([CH3:34])[C@@H:3]([N:11]1[C:20](=[O:21])[C:19]2=[CH:22][N:23](S(C3C=CC(C)=CC=3)(=O)=O)[C:17]3[C:18]2=[C:13]([CH:14]=[CH:15][N:16]=3)[CH2:12]1)[C:4]([O:6]C(C)(C)C)=[O:5].CO.[OH-].[Na+]>C(Cl)Cl>[CH3:1][CH:2]([CH3:34])[C@@H:3]([N:11]1[C:20](=[O:21])[C:19]2=[CH:22][NH:23][C:17]3[C:18]2=[C:13]([CH:14]=[CH:15][N:16]=3)[CH2:12]1)[C:4]([OH:6])=[O:5]

Participants

5

Reactant 3

HCID 887MethanolHCID 14798Sodium HydroxideHCID 67224983(R)-tert-Butyl 3-methyl-2-(3-oxo-1-tosylpyrrolo[4,3,2-de][2,6]naphthyridin-4(1H,3H,5H)-yl)butanoate

Product 1

HCID 67224069(R)-3-Methyl-2-(3-oxopyrrolo [4,3,2-de][2,6]naphthyridin-4(1H,3H,5H)-yl)butanoic acidYield 82%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A mixture of (R)-tert-Butyl 3-methyl-2-(3-oxo-1-tosylpyrrolo[4,3,2-de][2,6]naphthyridin-4(1H,3H,5H)-yl)butanoate (840 mg, 1.74 mmol), MeOH (4 mL), and aqueous NaOH (1N, 2 mL) was stirred for 40 min at room temperature. The material was diluted with DCM and washed with brine. The organics were dried over MgSO4 and concentrated in vacuo. Purification by silica gel chromatography (5% MeOH/DCM) gave a yellow oil (390 mg), which dissolved in TFA/DCM (50%) and stirred at room temperature for 1 h. The solution was concentrated and dried under vacuum to give the title compound as a tan solid (320 mg, 67%). 1H NMR (500 MHz, CD3OD) δ 0.88 (d, J=7.0 Hz, 3H), 1.10 (d, J=7.0 Hz, 3H), 2.35-2.44 (m, 1H), 4.95-5.33 (m, 3H), 7.34 (d, J=6.0 Hz, 1H), 7.90 (s, 1H), 8.33 (d, J=6.0 Hz, 1H). [M+H] calc'd for C14H15N3O3, 274; found, 274.

Workup

  1. washwashed with brine
  2. dry with materialThe organics were dried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customPurification by silica gel chromatography (5% MeOH/DCM)

Sources & evidence

ORD record
ord-a4b612d856f4494d97ff242801f428d6
Source dataset
uspto-grants-2013_04
Patent number
US08420816B2

Reaction notes

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