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

HRID 546915Notes

Reaction equation

HRID 546915 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])[CH2:84][C:85]1[CH:90]=[CH:89][C:88](Cl)=[CH:87][C:86]=1[Cl:92]>C(OCC)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:81][O:82][C:83](=[O:93])[CH2:84][C:85]1[CH:90]=[CH:89][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:87][C:86]=1[Cl:92]

Participants

7

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 2734106Methyl 2,4-dichlorobenzeneacetateHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 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 57709101[4'-(1-{4-[3-(t-butyl-dimethyl-silanyloxy)-4,4-dimethyl-pentyl]-3-methyl-phenyl}-1-ethyl-propyl)-3-chloro-2'-methyl-biphenyl-4-yl]-acetic Acid Methyl EsterYield 17.5%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 3283Diethyl EtherSolvent

Conditions

Temperature
100 °C

Procedure

Degassed toluene (0.13 mL) and water (0.013 mL) were 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); 15.7 mg, 0.0259 mmol), palladium (II) acetate (0.8 mg, 0.004 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl (3 mg, 0.007 mmol) and potassium phosphate (20.0 mg, 0.0942 mmol). After replacement with nitrogen, (2,4-dichloro-phenyl)acetic acid methyl ester (Example 41; 17 mg, 0.078 mmol) was added. After replacement with nitrogen, the mixture was heated while stirring at an external temperature of 96 to 104° C. for 30 minutes. 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=50/1) to give the title compound (3 mg, 17%).

Workup

  1. customDegassed toluene (0.13 mL) and water (0.013 mL)
  2. temperatureAfter replacement with nitrogen, the mixture was heated
  3. filtrationfiltered through cotton plug
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. customThe residue was purified by silica gel chromatography (hexane/ethyl acetate=50/1)

Sources & evidence

ORD record
ord-7463ae4f34b94a578c4127c0da4f4c2e
Source dataset
uspto-grants-2011_05
Patent number
US07935688B2

Reaction notes

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