Water → 3-(3-{[3-(2-Ethoxycarbonyl-2-methylpropyl)-phenyl]-hydroxymethyl}-phenyl)-2,2-dimethylpropionic acid ethyl ester

HRID 2057202Notes

Reaction equation

HRID 2057202 reaction equation
[CH2:1]([O:3][C:4](=[O:32])[C:5]([CH3:31])([CH3:30])[CH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[C:9]([C:13](=[O:29])[C:14]2[CH:19]=[CH:18][CH:17]=[C:16]([CH2:20][C:21]([C:24]([O:26][CH2:27][CH3:28])=[O:25])([CH3:23])[CH3:22])[CH:15]=2)[CH:8]=1)[CH3:2].[BH4-].[Na+].O.ClCCl>CO>[CH2:1]([O:3][C:4](=[O:32])[C:5]([CH3:30])([CH3:31])[CH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[C:9]([CH:13]([C:14]2[CH:19]=[CH:18][CH:17]=[C:16]([CH2:20][C:21]([C:24]([O:26][CH2:27][CH3:28])=[O:25])([CH3:23])[CH3:22])[CH:15]=2)[OH:29])[CH:8]=1)[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 6344DichloromethaneHCID 4311764Sodium borohydrideHCID 112591923-{3-[3-(2-Ethoxycarbonyl-2-methylpropyl)-benzoyl]phenyl}-2,2-dimethylpropionic acid ethyl ester

Product 1

HCID 666169963-(3-{[3-(2-Ethoxycarbonyl-2-methylpropyl)-phenyl]-hydroxymethyl}-phenyl)-2,2-dimethylpropionic acid ethyl esterYield 100%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Under Ar atmosphere, to a solution of 3-{3-[3-(2-ethoxycarbonyl-2-methyl-propyl)-benzoyl]-phenyl}-2,2-dimethylpropionic acid ethyl ester (12.37 g, 28.2 mmol) in methanol (240 mL) was added sodium borohydride (0.45 g, 13.7 mmol) under cooling with an ice water bath. The mixture was stirred for 5 h and water (480 mL) and dichloromethane (200 mL) were added. The aqueous layer was extracted with dichloromethane (2×200 mL). The combined organic layers were washed with saturated NaHCO3 solution (150 mL and saturated NaCl solution (150 mL), dried over MgSO4, and concentrated under vacuum to give 3-(3-{[3-(2-ethoxycarbonyl-2-methylpropyl)-phenyl]-hydroxymethyl}-phenyl)-2,2-dimethylpropionic acid ethyl ester (12.4 g, 100%) as a colorless oil, which was used for the next step without further purification. 1H NMR (300 MHz, CDCl3/TMS): δ (ppm): 7.20-7.18 (m, 4H), 7.10 (s, 2H), 7.00-6.98 (m, 2H), 5.69 (d, 1H, J=3.2 Hz), 4.02 (q, 4H, J=7.1 Hz), 2.97 (d, 1H, J=3.2 Hz), 2.81 (s, 4H), 1.19 (t, 6H, J=7.1 Hz), 1.13 (s, 12H). 13C NMR (75 MHz, CDCl3=77.23 ppm): δ (ppm): 177.6, 143.8, 138.2, 129.3, 128.5, 128.1, 124.8, 76.1, 60.5, 46.3, 43.6, 25.1, 25.0, 14.3. HRMS (LSIMS, gly): Calcd for C27H35O4 (M+H−H2O): 423.2535, found: 423.2542.

Workup

  1. temperatureunder cooling with an ice water bath
  2. extractionThe aqueous layer was extracted with dichloromethane (2×200 mL)
  3. washThe combined organic layers were washed with saturated NaHCO3 solution (150 mL and saturated NaCl solution (150 mL)
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-811254a64b2940fcaad9cacbd08e488d
Source dataset
uspto-grants-2008_02
Patent number
US07335799B2

Reaction notes

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