Triethylamine → 6-{[(1-{2-[7-(methyloxy)-2-oxo-1,5-naphthyridin-1(2H)-yl]ethyl}-4-piperidinyl)amino]methyl}-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one Hydrochloride

HRID 656899Notes

Reaction equation

HRID 656899 reaction equation
[ClH:1].Cl.[NH2:3][CH:4]1[CH2:9][CH2:8][N:7]([CH2:10][CH2:11][N:12]2[C:21]3[C:16](=[N:17][CH:18]=[C:19]([O:22][CH3:23])[CH:20]=3)[CH:15]=[CH:14][C:13]2=[O:24])[CH2:6][CH2:5]1.C(N(CC)CC)C.[O:32]=[C:33]1[CH2:38][O:37][C:36]2[CH:39]=[CH:40][C:41]([CH:43]=O)=[N:42][C:35]=2[NH:34]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C([O-])(O)=O.[Na+]>C(Cl)(Cl)Cl.CO>[ClH:1].[CH3:23][O:22][C:19]1[CH:20]=[C:21]2[C:16]([CH:15]=[CH:14][C:13](=[O:24])[N:12]2[CH2:11][CH2:10][N:7]2[CH2:6][CH2:5][CH:4]([NH:3][CH2:43][C:41]3[CH:40]=[CH:39][C:36]4[O:37][CH2:38][C:33](=[O:32])[NH:34][C:35]=4[N:42]=3)[CH2:9][CH2:8]2)=[N:17][CH:18]=1

Participants

8

Reactant 5

HCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 218737373-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehydeHCID 674973941-[2-(4-Amino-1-piperidinyl)ethyl]-7-(methyloxy)-1,5-naphthyridin-2(1H)-one dihydrochloride

Product 1

HCID 689241086-{[(1-{2-[7-(methyloxy)-2-oxo-1,5-naphthyridin-1(2H)-yl]ethyl}-4-piperidinyl)amino]methyl}-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one HydrochlorideYield 71%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6212ChloroformSolvent

Procedure

A mixture of 1-[2-(4-amino-1-piperidinyl)ethyl]-7-(methyloxy)-1,5-naphthyridin-2(1H)-one dihydrochloride (164 mg, 0.440 mmol) in chloroform (5 ml) and MeOH (0.5 ml) was treated with triethylamine (194 μl, 1.40 mmol) and stirred for 0.25 h before addition of 3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carboxaldehyde (for a synthesis see WO2003087098, Example 31(e)) (71 mg, 0.40 mmol). The reaction was stirred for 0.5 h before addition of NaBH(OAc)3 (254 mg, 1.20 mmol). The reaction was stirred for a further 0.5 h before addition of sat. aq NaHCO3 (20 ml). The reaction was then extracted with 20% MeOH in DCM (3×200 ml). The combined organic phases were dried, evaporated and the crude residue purified by chromatography on silica gel using a 0-20% MeOH/DCM gradient to provide the free base of the title compound (144 mg, 71%).

Workup

  1. extractionThe reaction was then extracted with 20% MeOH in DCM (3×200 ml)
  2. customThe combined organic phases were dried
  3. customevaporated
  4. customthe crude residue purified by chromatography on silica gel using a 0-20% MeOH/DCM gradient

Sources & evidence

ORD record
ord-d61157bbbab54c8aa76a7675d12c5103
Source dataset
uspto-grants-2011_12
Patent number
US08071592B2

Reaction notes

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