4-(4-Fluorobenzoyl)piperidine → 8-[4-(4-Fluoro-Benzoyl)-Piperidin-1-Ylmethyl]-1,3,7,8-Tetrahydro-6,9-Dioxa-1,3-Diaza-Cyclopenta[a]Naphthalen-2-One

HRID 982679Notes

Reaction equation

HRID 982679 reaction equation
CC1C=CC(S(O[CH2:12][C@@H:13]2[O:26][C:17]3[C:18]4[NH:22][C:21](=[O:23])[NH:20][C:19]=4[CH:24]=[CH:25][C:16]=3[O:15][CH2:14]2)(=O)=O)=CC=1.[F:27][C:28]1[CH:41]=[CH:40][C:31]([C:32]([CH:34]2[CH2:39][CH2:38][NH:37][CH2:36][CH2:35]2)=[O:33])=[CH:30][CH:29]=1>CS(C)=O.C(OCC)(=O)C>[F:27][C:28]1[CH:29]=[CH:30][C:31]([C:32]([CH:34]2[CH2:39][CH2:38][N:37]([CH2:12][CH:13]3[O:26][C:17]4[C:16](=[CH:25][CH:24]=[C:19]5[NH:20][C:21](=[O:23])[NH:22][C:18]5=4)[O:15][CH2:14]3)[CH2:36][CH2:35]2)=[O:33])=[CH:40][CH:41]=1

Participants

5

Reactant 2

HCID 27244404-(4-Fluorobenzoyl)piperidineHCID 11428826(8R)-1,3,7,8-tetrahydro-8-[[[(4-methylphenyl)sulfonyl]oxy]methyl]-2H-[1,4]dioxino[2,3-e]benzimidazol-2-one

Product 1

HCID 102730298-[4-(4-Fluoro-Benzoyl)-Piperidin-1-Ylmethyl]-1,3,7,8-Tetrahydro-6,9-Dioxa-1,3-Diaza-Cyclopenta[a]Naphthalen-2-One

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of 0.60 g (1.6 mmole) of (8R)-1,3,7,8-tetrahydro-8-[[[(4 methylphenyl)sulfonyl]oxy]methyl]-2H-[1,4]dioxino[2,3-e]benzimidazol-2-one and 1.7 g (8.0 mmole) of 4-(4-fluorobenzoyl)piperidine in 30 mL of DMSO was heated at in 90° C. under nitrogen for 5 hours. The reaction was allowed to come to room temperature, diluted to 500 mL with ethyl acetate, washed with 500 mL portions of saturated aqueous sodium bicarbonate and water, dried over sodium sulfate, filtered and evaporated in vacuum. The residue was column chromatographed on silica gel with 2% methanol in chloroform as eluant and the product fractions evaporated to give the free base as a colorless oil. This was recrystallized from ethanol with the addition of 4 N isopropanolic HCl to give 0.13 g of the (S)-enantiomer of the title compound. A second recrystallization from ethanol gave 0.095 g of the product as a white solid hydrochloride, hydrate, m.p. 250-256° C. (d).

Workup

  1. customto come to room temperature
  2. washwashed with 500 mL portions of saturated aqueous sodium bicarbonate and water
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. customevaporated in vacuum
  6. customchromatographed on silica gel with 2% methanol in chloroform as eluant
  7. customthe product fractions evaporated

Sources & evidence

ORD record
ord-e071e2f576b847cebe66fd780629f2e1
Source dataset
uspto-grants-2005_03
Patent number
US06861434B2

Reaction notes

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