Sodium Carbonate → HCID 178523817, compound

HRID 25533Notes

Reaction equation

HRID 25533 reaction equation
Cl.[NH2:2][C@H:3]1[CH2:8][CH2:7][C@H:6]([OH:9])[CH2:5][CH2:4]1.C([O-])([O-])=O.[Na+].[Na+].Cl[C:17]([O:19][CH2:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)=[O:18]>C1COCC1.O.CCOC(C)=O>[CH2:20]([O:19][C:17](=[O:18])[NH:2][C@H:3]1[CH2:8][CH2:7][C@H:6]([OH:9])[CH2:5][CH2:4]1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 10387Benzyl chloroformateHCID 178479278HCID 178479278, compound

Product 1

HCID 178523817HCID 178523817, compoundYield 197.4%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a suspension of 50 g (0.33 mol) trans-4-aminocyclohexanol.hydrochloride and 77 g (0.726 mol, 2.2 eq) Na2CO3 in 650 ml THF and 150 ml water, 51.2 ml (0.363 mol, 1.1 eq) benzyl chloroformate were added at 5° C. over a period of 20 min. The reaction mixture was stirred at RT for 2 h, diluted with EtOAc and the phases were separated. The organic layer was washed with brine, dried over Na2SO4, filtered and evaporated. Trituration from hexane yielded 162.4 g (98%) trans-4-Hydroxy-cyclohexylcarbamic acid benzyl ester as white crystals, MS: 249 (M) (in analogy to: Venuti, Michael C.; Jones, Gordon H.; Alvarez, Robert; Bruno, John J.; J.Med.Chem.; 30; 2; 1987; 303-318).

Workup

  1. additionwere added at 5° C. over a period of 20 min
  2. customthe phases were separated
  3. washThe organic layer was washed with brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. customevaporated

Sources & evidence

ORD record
ord-f2881ca0ffc24a69967da231ffa7f28e
Source dataset
uspto-grants-2005_02
Patent number
US06858651B2

Reaction notes

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