Methanol → HCID 18623251, compound

HRID 565225Notes

Reaction equation

HRID 565225 reaction equation
[C:1]([C:3]1([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH2:8][CH2:7][CH:6]([NH:9][CH2:10][CH2:11][NH2:12])[CH2:5][CH2:4]1)#N.S(=O)(=O)(O)[OH:20].[CH3:24][OH:25]>>[CH3:24][O:25][C:1]([C:3]1([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH2:8][CH2:7][CH:6]([NH:9][CH2:10][CH2:11][NH2:12])[CH2:5][CH2:4]1)=[O:20]

Participants

4

Reactant 3

HCID 887MethanolHCID 1118Sulfuric AcidHCID 15541197HCID 15541197, compound

Product 1

HCID 18623251HCID 18623251, compoundYield 76%

Conditions

Temperature
82.5 °C

Procedure

A mixture of 2-[4-cyano-4-phenylcyclohexylamino]ethylamine (2.34 g, 10 mmol) and concentrated sulfuric acid (20 mL) was heated at 80-85° C. for 10 h. It was cooled to room temperature, mixed with anhydrous methanol (200 mL), and refluxed for 20 h. Solvent was evaporated and the residue was poured onto ice (200 g) and basified to pH 11 by addition 6 N NaOH. It was extracted with dichloromethane (4×125 mL), dried (potassium carbonate) and solvent evaporated to leave the product as an oil (2.1 g, 76%). This product was a pure mixture of cis and trans isomers. It was used in the next step without any further purification.

Workup

  1. temperatureIt was cooled to room temperature
  2. temperaturerefluxed for 20 h
  3. customSolvent was evaporated
  4. additionthe residue was poured onto ice (200 g)
  5. additionbasified to pH 11 by addition 6 N NaOH
  6. extractionIt was extracted with dichloromethane (4×125 mL)
  7. dry with materialdried (potassium carbonate) and solvent
  8. customevaporated

Sources & evidence

ORD record
ord-02fbd3c3ee304f7597ae048023e5897f
Source dataset
uspto-grants-2001_01
Patent number
US06172066B2

Reaction notes

Loading…