Cyclopentanone → 5-Chloro-N-(5-methylpyridin-2-yl)-2-[(1-cyclopentylpiperidin-4-yl)methylamino]benzamide

HRID 988686Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([NH:18][CH2:19][CH:20]2[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]2)=[C:6]([CH:17]=1)[C:7]([NH:9][C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[CH:12][N:11]=1)=[O:8].[C:26]1(=O)[CH2:30][CH2:29][CH2:28][CH2:27]1.C([BH3-])#N.[Na+]>CO.C(O)(=O)C.O1CCCC1>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([NH:18][CH2:19][CH:20]2[CH2:25][CH2:24][N:23]([CH:26]3[CH2:30][CH2:29][CH2:28][CH2:27]3)[CH2:22][CH2:21]2)=[C:6]([CH:17]=1)[C:7]([NH:9][C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[CH:12][N:11]=1)=[O:8]

Participants

Conditions

Temperature: 50 °C

Procedure

A solution of 5-chloro-N-(5-methylpyridin-2-yl)-2-[(4-piperidinylmethyl)amino]benzamide from Example 99-A (0.45 g, 1.25 mmol) in 10 mL of 95:5 methanol-acetic acid was treated with excess cyclopentanone (1.11 mL, 12.5 mmol), followed by sodium cyanoborohydride (5.0 ml of a 1 M solution in tetrahydrofuran, 6.0 mmol). After stirring at 50° C. for 36 h, the mixture was concentrated in vacuo; and the residue was subjected to silica gel chromatography. Elution with 9:1 dichloromethane-2 M ammonia in methanol afforded 0.31 g (58%) of the title compound as a yellow solid.

Workup

concentrationthe mixture was concentrated in vacuo
washElution with 9:1 dichloromethane-2 M ammonia in methanol

Sources & evidence

ORD record: ord-371554478e1c4785a1a7bbbfc1a734d3
Source dataset: uspto-grants-2003_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06635657B1

Reaction notes

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