Sodium Sulfate → HCID 10434288, compound

HRID 1435877Notes

Reaction equation

HRID 1435877 reaction equation
[CH3:1][O:2][C:3]1[N:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[N:9]=[CH:8][CH:7]=[C:6]2[C:13]1[N:18]=[CH:17][C:16]([CH2:19][CH2:20][NH2:21])=[CH:15][CH:14]=1.[O:22]=[C:23]1[CH2:28][S:27][C:26]2[CH:29]=[CH:30][C:31]([CH:33]=O)=[N:32][C:25]=2[NH:24]1.[O-]S([O-])(=O)=O.[Na+].[Na+].[BH4-].[Na+]>C(Cl)Cl.CCO>[CH3:1][O:2][C:3]1[N:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[N:9]=[CH:8][CH:7]=[C:6]2[C:13]1[N:18]=[CH:17][C:16]([CH2:19][CH2:20][NH:21][CH2:33][C:31]2[CH:30]=[CH:29][C:26]3[S:27][CH2:28][C:23](=[O:22])[NH:24][C:25]=3[N:32]=2)=[CH:15][CH:14]=1

Participants

7

Reactant 4

HCID 24436Sodium SulfateHCID 4311764Sodium borohydrideHCID 115935913-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carbaldehydeHCID 68443036HCID 68443036, compound

Product 1

HCID 10434288HCID 10434288, compoundYield 30.2%

Reagents, catalysts & solvents 2

HCID 702EthanolSolvent2×HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of 2-[6-(6-methoxy[1,5]naphthyridin-4-yl)pyridin-3-yl]ethylamine (0.94 mmole) in dry CH2Cl2 (25 mL) and dry EtOH (10 mL) at RT was added 3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carboxaldehyde (0.18 g, 0.94 mmole) and Na2SO4 (500 mg). After 24 h, the reaction contents were concentrated and dried under high vacuum. To a stirred solution of the crude imine in dry EtOH (25 mL) at RT was added NaBH4 (36 mg, 0.94 mmole). After 24 h, the reaction solution was concentrated under vacuum and to the residue was added 1M HCl (5 mL) and EtOAc (50 mL). After stirring for 1 h, 6M NaOH (1 mL) was added and the organic layer was separated, dried (Na2SO4) and concentrated. Purification on reverse-phase HPLC (CH3CN/H2O, 10-90%) afforded the title compound (0.13 g, 30%) as light yellow solid: 1H NMR (400 MHz, CDCl3) δ 9.89 (br s, 1H), 9.15 (m, 1H), 8.90 (m, 1H), 8.57 (d, J=9.1 Hz, 1H), 8.45 (d, J=9.1 Hz, 1H), 8.20 (m, 2H), 7.51 (m, 1H), 7.22 (d, J=9.1 Hz, 1H), 6.88 (d, J=7.9 Hz, 1H), 4.24 (m, 2H), 4.02 (s, 3H), 3.55 (m, 2H), 3.41 (m, 2H), 3.30 (s, 2H). LC-MS (ES) m/e 459 (M+H)+.

Workup

  1. customthe reaction contents
  2. concentrationwere concentrated
  3. customdried under high vacuum
  4. waitAfter 24 h
  5. concentrationthe reaction solution was concentrated under vacuum and to the residue
  6. additionwas added 1M HCl (5 mL) and EtOAc (50 mL)
  7. addition6M NaOH (1 mL) was added
  8. customthe organic layer was separated
  9. dry with materialdried (Na2SO4)
  10. concentrationconcentrated
  11. customPurification on reverse-phase HPLC (CH3CN/H2O, 10-90%)

Sources & evidence

ORD record
ord-9b8093dea01b4f8bb102027cc7695c02
Source dataset
uspto-grants-2009_11
Patent number
US07618959B2

Reaction notes

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