(S)-tert-butyl (4-methyl-1-((6-methyl-5-oxo-9-vinyl-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)pentan-2-yl)carbamate → (S)-tert-butyl (1-((9-ethyl-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan 2-yl)carbamate

HRID 1398402Notes

Reaction equation

HRID 1398402 reaction equation
[CH3:1][CH:2]([CH3:33])[CH2:3][C@H:4]([NH:25][C:26](=[O:32])[O:27][C:28]([CH3:31])([CH3:30])[CH3:29])[CH2:5][O:6][C:7]1[C:8]([CH:23]=[CH2:24])=[CH:9][C:10]2[C:19]3[C:14](=[CH:15][N:16]=[CH:17][CH:18]=3)[C:13](=[O:20])[N:12]([CH3:21])[C:11]=2[CH:22]=1.[H][H]>[Pd].CO.C(OCC)(=O)C>[CH2:23]([C:8]1[C:7]([O:6][CH2:5][C@@H:4]([NH:25][C:26](=[O:32])[O:27][C:28]([CH3:29])([CH3:30])[CH3:31])[CH2:3][CH:2]([CH3:1])[CH3:33])=[CH:22][C:11]2[N:12]([CH3:21])[C:13](=[O:20])[C:14]3[C:19]([C:10]=2[CH:9]=1)=[CH:18][CH:17]=[N:16][CH:15]=3)[CH3:24]

Participants

6

Reactant 2

HCID 86710388(S)-tert-butyl (4-methyl-1-((6-methyl-5-oxo-9-vinyl-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)pentan-2-yl)carbamateHCID 178418361HCID 178418361, compound

Product 1

HCID 86710389(S)-tert-butyl (1-((9-ethyl-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan 2-yl)carbamateYield 40.1%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 887MethanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of (S)-tert-butyl (4-methyl-1-((6-methyl-5-oxo-9-vinyl-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)pentan-2-yl)carbamate (0.15 g, 0.332 mmol) and palladium on carbon (0.075 g, 0.070 mmol) in MeOH (3 mL) and ethyl acetate (3 mL) was stirred at RT under a balloon of hydrogen gas for 24 h. The reaction mixture was filtered through diatomaceous earth (Celite®) and the filtrate was concentrated under reduced pressure. The residue was purified by prep TLC (60% ethyl acetate and petroleum ether) to afford (S)-tert-butyl (1-((9-ethyl-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan 2-yl)carbamate (0.11 g, 0.133 mmol, 40% yield) as a yellow semi solid. LC/MS (ESI) m/e 454.4, [(M+H)+, calcd for C26H36N3O4, 454.3]; LC/MS retention time (method D): tR=0.96 min.

Workup

  1. filtrationThe reaction mixture was filtered through diatomaceous earth (Celite®)
  2. concentrationthe filtrate was concentrated under reduced pressure
  3. customThe residue was purified by prep TLC (60% ethyl acetate and petroleum ether)

Sources & evidence

ORD record
ord-3fd75b2f1cc34157bd940dd5e7acd6f0
Source dataset
uspto-grants-2014_12
Patent number
US08901305B2

Reaction notes

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