Sodium triacetoxyborohydride → 6-[({1-[2-(6,7-Dimethoxy-2-oxoquinoxalin-1(2H)-yl)ethyl]piperidin-4-yl}amino)methyl]-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one

HRID 255321Notes

Reaction equation

HRID 255321 reaction equation
[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([CH2:8][CH2:9][N:10]2[C:19]3[C:14](=[CH:15][C:16]([O:22][CH3:23])=[C:17]([O:20][CH3:21])[CH:18]=3)[N:13]=[CH:12][C:11]2=[O:24])[CH2:4][CH2:3]1.[O:25]=[C:26]1[CH2:31][O:30][C:29]2[CH:32]=[CH:33][C:34]([CH:36]=O)=[N:35][C:28]=2[NH:27]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>>[CH3:23][O:22][C:16]1[CH:15]=[C:14]2[C:19](=[CH:18][C:17]=1[O:20][CH3:21])[N:10]([CH2:9][CH2:8][N:5]1[CH2:6][CH2:7][CH:2]([NH:1][CH2:36][C:34]3[CH:33]=[CH:32][C:29]4[O:30][CH2:31][C:26](=[O:25])[NH:27][C:28]=4[N:35]=3)[CH2:3][CH2:4]1)[C:11](=[O:24])[CH:12]=[N:13]2

Participants

4

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 218737373-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehydeHCID 667747511-[2-(4-Aminopiperidin-1-yl)ethyl]-6,7-dimethoxyquinoxalin-2(1H)-one2×

Product 1

HCID 159826656-[({1-[2-(6,7-Dimethoxy-2-oxoquinoxalin-1(2H)-yl)ethyl]piperidin-4-yl}amino)methyl]-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-oneYield 68.6%

Procedure

1-[2-(4-Aminopiperidin-1-yl)ethyl]-6,7-dimethoxyquinoxalin-2 (1H)-one (Intermediate 156, 75 mg, 0.23 mmol), 3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehyde (WO 2004/058144) (40 mg, 0.23 mmol), and sodium triacetoxy borohydride (150 mg, 0.69 mmol) were reacted as described according to Example 69 to give 78 mg (68%) of the free base of the product as a colorless solid.

Sources & evidence

ORD record
ord-e8ba2cf84a7d407e854fe9c9bf4fb684
Source dataset
uspto-grants-2011_01
Patent number
US07875715B2

Reaction notes

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