Potassium Phosphate, Tribasic → (R)-[4'-(1-{4-[3-(t-butyl-dimethyl-silanyloxy)-4,4-dimethyl-pentyl]-3-methyl-phenyl}-1-ethyl-propyl)-2'-methyl-biphenyl-3-yl]-hydroxy-acetic Acid Methyl Ester

HRID 547103Notes

Reaction equation

HRID 547103 reaction equation
[C:1]([Si:5]([O:8][CH:9]([CH2:14][CH2:15][C:16]1[CH:21]=[CH:20][C:19]([C:22]([CH2:41][CH3:42])([C:25]2[CH:30]=[CH:29][C:28](B3OC(C)(C)C(C)(C)O3)=[C:27]([CH3:40])[CH:26]=2)[CH2:23][CH3:24])=[CH:18][C:17]=1[CH3:43])[C:10]([CH3:13])([CH3:12])[CH3:11])([CH3:7])[CH3:6])([CH3:4])([CH3:3])[CH3:2].C1(P(C2CCCCC2)C2C=CC=CC=2C2C(OC)=CC=CC=2OC)CCCCC1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].[CH3:81][O:82][C:83](=[O:93])[C@@H:84]([C:86]1[CH:91]=[CH:90][CH:89]=[C:88](Cl)[CH:87]=1)[OH:85]>C1(C)C=CC=CC=1.O.C(OCC)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:81][O:82][C:83](=[O:93])[C@@H:84]([C:86]1[CH:87]=[C:88]([C:28]2[CH:29]=[CH:30][C:25]([C:22]([C:19]3[CH:20]=[CH:21][C:16]([CH2:15][CH2:14][CH:9]([O:8][Si:5]([C:1]([CH3:4])([CH3:3])[CH3:2])([CH3:6])[CH3:7])[C:10]([CH3:13])([CH3:12])[CH3:11])=[C:17]([CH3:43])[CH:18]=3)([CH2:23][CH3:24])[CH2:41][CH3:42])=[CH:26][C:27]=2[CH3:40])[CH:89]=[CH:90][CH:91]=1)[OH:85]

Participants

9

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 15606324(R)-Methyl 2-(3-chlorophenyl)-2-hydroxyacetateHCID 577089262-[4-(1-{4-[3-(t-Butyldimethyl-silanyloxy)-4,4-dimethyl-pentyl]-3-methyl-phenyl}-1-ethyl-propyl)-2-methyl-phenyl]-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane

Product 1

HCID 57708960(R)-[4'-(1-{4-[3-(t-butyl-dimethyl-silanyloxy)-4,4-dimethyl-pentyl]-3-methyl-phenyl}-1-ethyl-propyl)-2'-methyl-biphenyl-3-yl]-hydroxy-acetic Acid Methyl EsterYield 71%

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 1140TolueneSolventHCID 3283Diethyl EtherSolvent

Procedure

Degassed toluene (0.17 mL) was added to t-butyl-(1-{2-[4-(1-ethyl-1-{4-[4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl]-3-methyl-phenyl}-propyl)-2-methyl-phenyl]-ethyl}-2,2-dimethyl-propoxy)dimethylsilane (Example 23-(1); 46.5 mg, 0.0766 mmol), palladium (II) acetate (2.8 mg, 0.013 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl (10.5 mg, 0.0256 mmol) and potassium phosphate (39.8 mg, 0.187 mmol), and the mixture was stirred in a nitrogen atmosphere for three minutes. Then, a solution of (R)-(3-chloro-phenyl)hydroxy-acetic acid methyl ester (Example 156-(1); 18.8 mg, 0.0937 mmol) in toluene (0.17 mL) and water (0.033 mL) were added, and the mixture was heated while stirring at an external temperature of 95 to 105° C. for one hour. The reaction mixture was diluted with diethyl ether and filtered through cotton plug, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate=8/1) to give the title compound (35 mg, 71%).

Workup

  1. customDegassed toluene (0.17 mL)
  2. temperaturethe mixture was heated
  3. stirringwhile stirring at an external temperature of 95 to 105° C. for one hour
  4. filtrationfiltered through cotton plug
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customThe residue was purified by silica gel chromatography (hexane/ethyl acetate=8/1)

Sources & evidence

ORD record
ord-321e52c6de9a4dc0a57976724f634624
Source dataset
uspto-grants-2011_05
Patent number
US07935688B2

Reaction notes

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