Sodium triacetoxyborohydride → Methyl (3R,4R)-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]-4-[(2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)amino]piperidine-3-carboxylate

HRID 1644313Notes

Reaction equation

HRID 1644313 reaction equation
[NH2:1][C@@H:2]1[CH2:7][CH2:6][N:5]([CH2:8][CH2:9][N:10]2[C:19]3[C:14](=[C:15]([F:21])[CH:16]=[C:17]([F:20])[CH:18]=3)[CH:13]=[CH:12][C:11]2=[O:22])[CH2:4][C@H:3]1[C:23]([O:25][CH3:26])=[O:24].[O:27]1[C:36]2[CH:35]=[C:34]([CH:37]=O)[N:33]=[CH:32][C:31]=2[O:30][CH2:29][CH2:28]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>>[F:21][C:15]1[CH:16]=[C:17]([F:20])[CH:18]=[C:19]2[C:14]=1[CH:13]=[CH:12][C:11](=[O:22])[N:10]2[CH2:9][CH2:8][N:5]1[CH2:6][CH2:7][C@@H:2]([NH:1][CH2:37][C:34]2[N:33]=[CH:32][C:31]3[O:30][CH2:29][CH2:28][O:27][C:36]=3[CH:35]=2)[C@H:3]([C:23]([O:25][CH3:26])=[O:24])[CH2:4]1

Participants

4

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 218736682,3-Dihydro[1,4]dioxino[2,3-c]pyridine-7-carbaldehydeHCID 66774891Methyl (3R,4R)-4-amino-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]piperidine-3-carboxylate2×

Product 1

HCID 66774538Methyl (3R,4R)-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]-4-[(2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)amino]piperidine-3-carboxylateYield 79.2%

Procedure

Methyl(3R,4R)-4-amino-1-[2-(5,7-difluoro-2-oxoquinolin-1(2H)-yl)ethyl]piperidine-3-carboxylate (Intermediate 38) (195 mg, 0.53 mmol), 2,3-dihydro[1,4]dioxino[2,3-c]pyridine-7-carbaldehyde (WO 2004/058144) (88 mg, 0.53 mmol) and sodium triacetoxy borohydride (339 mg, 1.6 mmol) were reacted as described for Example 14 to give 216 mg (79%) of product as a colorless hard foam.

Sources & evidence

ORD record
ord-24cb280a4e1949318448ca8aa9a3b61d
Source dataset
uspto-grants-2012_02
Patent number
US08124602B2

Reaction notes

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