Methanol → (+/-)-3,4-bis-cyclopropylmethoxy-N-[(1RS,2RS,5RS)-2-(3,4-dimethoxyphenyl)-5-hydroxycyclohexyl]benzamide

HRID 30071Notes

Reaction equation

HRID 30071 reaction equation
[CH:1]1([CH2:4][O:5][C:6]2[CH:7]=[C:8]([CH:29]=[CH:30][C:31]=2[O:32][CH2:33][CH:34]2[CH2:36][CH2:35]2)[C:9]([NH:11][CH:12]2[CH:18]([C:19]3[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[C:21]([O:27][CH3:28])[CH:20]=3)[CH2:17][CH:16]3[CH:14]([O:15]3)[CH2:13]2)=[O:10])[CH2:3][CH2:2]1.[BH4-].[Na+].CO.O>C(O)(C)(C)C.C(OCC)(=O)C>[CH:1]1([CH2:4][O:5][C:6]2[CH:7]=[C:8]([CH:29]=[CH:30][C:31]=2[O:32][CH2:33][CH:34]2[CH2:35][CH2:36]2)[C:9]([NH:11][CH:12]2[CH2:13][CH:14]([OH:15])[CH2:16][CH2:17][CH:18]2[C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[C:21]([O:27][CH3:28])[CH:20]=2)=[O:10])[CH2:2][CH2:3]1

Participants

7

Reactant 4

HCID 887MethanolHCID 962WaterHCID 4311764Sodium borohydrideHCID 86601279(+/-)-3,4-bis-cyclopropylmethoxy-N-[(3RS,4RS)-4-(3,4-dimethoxyphenyl)-7-oxabicyclo[4.1.0]-hept-3-yl]benzamide2×

Product 1

HCID 68986614(+/-)-3,4-bis-cyclopropylmethoxy-N-[(1RS,2RS,5RS)-2-(3,4-dimethoxyphenyl)-5-hydroxycyclohexyl]benzamideYield 68.2%

Reagents, catalysts & solvents 2

HCID 6386tert-ButanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

16.5 g of (±)-3,4-bis-cyclopropylmethoxy-N-[(3RS,4RS)-4-(3,4-dimethoxyphenyl)-7-oxabicyclo[4.1.0]-hept-3-yl]benzamide (compound E1) are dissolved in 500 ml of tert-butanol, 5.0 g of sodium borohydride are added and the reaction mixture is heated to boiling. After slow addition of 70 ml of methanol, the reaction mixture is cooled and treated with 200 ml of water and 150 ml of ethyl acetate. The organic phase is dried using sodium sulfate, concentrated and the residue is chromatographed on silica gel using a mixture of petroleum ether/ethyl acetate in the ratio 1/2. 11.3 g of the title compound are obtained.

Workup

  1. temperaturethe reaction mixture is heated to boiling
  2. temperaturethe reaction mixture is cooled
  3. customThe organic phase is dried
  4. concentrationconcentrated
  5. customthe residue is chromatographed on silica gel using
  6. additiona mixture of petroleum ether/ethyl acetate in the ratio 1/2

Sources & evidence

ORD record
ord-887b89fa857b4adb9f116c835ffbcbb4
Source dataset
uspto-grants-2008_09
Patent number
US07423046B2

Reaction notes

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