Triethylamine → 2-[4-(4-Fluoro-benzyl)-piperidin-1-yl]-2-oxo-N-(2-oxo-2,3-dihydro-1H-benzimidazol-5-yl)-acetamide

HRID 2114962Notes

Reaction equation

HRID 2114962 reaction equation
[F:1][C:2]1[CH:19]=[CH:18][C:5]([CH2:6][CH:7]2[CH2:12][CH2:11][N:10]([C:13](=[O:17])[C:14]([OH:16])=O)[CH2:9][CH2:8]2)=[CH:4][CH:3]=1.C(N(CC)CC)C.[NH2:27][C:28]1[CH:37]=[CH:36][C:31]2[NH:32][C:33](=[O:35])[NH:34][C:30]=2[CH:29]=1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C)C=O>[F:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:6][CH:7]2[CH2:8][CH2:9][N:10]([C:13](=[O:17])[C:14]([NH:27][C:28]3[CH:37]=[CH:36][C:31]4[NH:32][C:33](=[O:35])[NH:34][C:30]=4[CH:29]=3)=[O:16])[CH2:11][CH2:12]2)=[CH:18][CH:19]=1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 667655-Amino-2-hydroxybenzimidazoleHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 51342220[4-(4-Fluorobenzyl)piperidin-1-yl](oxo)acetic acid

Product 1

HCID 101575702-[4-(4-Fluoro-benzyl)-piperidin-1-yl]-2-oxo-N-(2-oxo-2,3-dihydro-1H-benzimidazol-5-yl)-acetamideYield 48%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A mixture of 2.5 g (9.6 mmol) of [4-(4-fluoro-benzyl)-piperidin-1-yl]-oxo-acetic acid (Example 1b), 1.1 ml (8 mmol) of triethylamine, 1.2 g (8 mmol) of 5-amino-1,3-dihydro-benzimidazol-2-one [J. Amer. Chem. Soc., 80, 1657. (1958)] 3.03 g (8 mmol) of HBTU and 80 ml of dimethylformamide is stirred at room temperature for 24 hours. The reaction mixture is concentrated, then 100 ml of 8% sodium hydrogencarbonate solution is added. The precipitated product is filtered off and recrystallized from methanol to yield 1.51 g (48%) of the title compound. Melting Point: >260° C. (methanol)

Workup

  1. concentrationThe reaction mixture is concentrated
  2. addition100 ml of 8% sodium hydrogencarbonate solution is added
  3. filtrationThe precipitated product is filtered off
  4. customrecrystallized from methanol

Sources & evidence

ORD record
ord-03dc3a33f4c34f5d862a1fdfffa3dde0
Source dataset
uspto-grants-2008_10
Patent number
US07435744B2

Reaction notes

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