Hydrochloric Acid → HCID 21241598, compound

HRID 1761496Notes

Reaction equation

HRID 1761496 reaction equation
[O:1]1[C:6]2[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=2[O:4][CH2:3][CH:2]1[CH2:11][N:12]1[CH2:17][CH2:16][CH:15]([C:18]2([CH3:23])OCC[O:19]2)[CH2:14][CH2:13]1.Cl.[OH-].[Na+]>>[O:1]1[C:6]2[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=2[O:4][CH2:3][CH:2]1[CH2:11][N:12]1[CH2:13][CH2:14][CH:15]([C:18](=[O:19])[CH3:23])[CH2:16][CH2:17]1

Participants

4

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 21241621HCID 21241621, compound

Product 1

HCID 21241598HCID 21241598, compoundYield 55.8%

Procedure

A mixture of 20.6 parts of 1-[(2,3-dihydro-1,4-benzodioxin-2-yl)methyl]-4-(2-methyl-1,3-dioxolan-2-yl)piperidine and 200 parts of a hydrochloric acid solution 2N was stirred and refluxed for 15 hours. After cooling, crushed ice was added. The whole was treated with a sodium hydroxide solution. The product was extracted with dichloromethane. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (99:1 by volume) as eluent. The pure fractions were collected and the eluent was evaporated, yielding 10 parts (55.8%) of 1-[1-[(2,3-dihydro-1,4-benzodioxin-2-yl)methyl]-4-piperidinyl]ethanone as an oily residue (intermediate 87).

Workup

  1. temperaturerefluxed for 15 hours
  2. temperatureAfter cooling
  3. customcrushed ice
  4. additionwas added
  5. extractionThe product was extracted with dichloromethane
  6. customThe extract was dried
  7. filtrationfiltered
  8. customevaporated
  9. customThe residue was purified by column chromatography over silica gel using
  10. additiona mixture of trichloromethane and methanol (99:1 by volume) as eluent
  11. customThe pure fractions were collected
  12. customthe eluent was evaporated

Sources & evidence

ORD record
ord-f9dc8e3fc8064bf094d67e7090805c7a
Source dataset
uspto-grants-1989_05
Patent number
US04826848

Reaction notes

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