Sodium cyanoborohydride → 6-[({1-[2-(7-Bromo-2-oxo-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-1-yl)ethyl]piperidin-4-yl}amino)methyl]-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one

HRID 255374Notes

Reaction equation

HRID 255374 reaction equation
[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([CH2:8][CH2:9][N:10]2[C:15](=[O:16])[CH2:14][O:13][C:12]3[N:17]=[CH:18][C:19]([Br:21])=[CH:20][C:11]2=3)[CH2:4][CH2:3]1.[O:22]=[C:23]1[CH2:28][O:27][C:26]2[CH:29]=[CH:30][C:31]([CH:33]=O)=[N:32][C:25]=2[NH:24]1.C([BH3-])#N.[Na+]>>[Br:21][C:19]1[CH:18]=[N:17][C:12]2[O:13][CH2:14][C:15](=[O:16])[N:10]([CH2:9][CH2:8][N:5]3[CH2:4][CH2:3][CH:2]([NH:1][CH2:33][C:31]4[CH:30]=[CH:29][C:26]5[O:27][CH2:28][C:23](=[O:22])[NH:24][C:25]=5[N:32]=4)[CH2:7][CH2:6]3)[C:11]=2[CH:20]=1

Participants

4

Reactant 3

HCID 5003444Sodium cyanoborohydrideHCID 218737373-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehydeHCID 667742821-[2-(4-Aminopiperidin-1-yl)ethyl]-7-bromo-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one2×

Product 1

HCID 667747596-[({1-[2-(7-Bromo-2-oxo-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-1-yl)ethyl]piperidin-4-yl}amino)methyl]-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-oneYield 41%

Procedure

1-[2-(4-Aminopiperidin-1-yl)ethyl]-7-bromo-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one (Intermediate 209) (2.0 mmol), (3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehyde (WO 2004/058144) (356 mg, 2.0 mmol) and sodium cyanoborohydride (496 mg, 4 equiv) were reacted as described under Example 21 to give the product as an off-white solid 420 mg (41% yield).

Sources & evidence

ORD record
ord-b6c959dc50124a1392196a2d6f7cd60f
Source dataset
uspto-grants-2011_01
Patent number
US07875715B2

Reaction notes

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