Tributylphosphine → methyl[(3S)-6-({4'-[2-(ethylthio)ethoxy]-2',6'-dimethylbiphenyl-3-yl}methoxy)-2,3-dihydro-1-benzofuran-3-yl]acetate

HRID 1908883Notes

Reaction equation

HRID 1908883 reaction equation
[OH:1][C:2]1[CH:15]=[CH:14][C:5]2[C@H:6]([CH2:9][C:10]([O:12][CH3:13])=[O:11])[CH2:7][O:8][C:4]=2[CH:3]=1.[CH2:16]([S:18][CH2:19][CH2:20][O:21][C:22]1[CH:27]=[C:26]([CH3:28])[C:25]([C:29]2[CH:34]=[CH:33][CH:32]=[C:31]([CH2:35]O)[CH:30]=2)=[C:24]([CH3:37])[CH:23]=1)[CH3:17].C(P(CCCC)CCCC)CCC.N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O>C1(C)C=CC=CC=1.CCCCCC>[CH2:16]([S:18][CH2:19][CH2:20][O:21][C:22]1[CH:27]=[C:26]([CH3:28])[C:25]([C:29]2[CH:34]=[CH:33][CH:32]=[C:31]([CH2:35][O:1][C:2]3[CH:15]=[CH:14][C:5]4[C@H:6]([CH2:9][C:10]([O:12][CH3:13])=[O:11])[CH2:7][O:8][C:4]=4[CH:3]=3)[CH:30]=2)=[C:24]([CH3:37])[CH:23]=1)[CH3:17]

Participants

7

Reactant 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 53393313(S)-Methyl 2-(6-hydroxy-2,3-dihydrobenzofuran-3-yl)acetateHCID 59342614{4'-[2-(Ethylthio)ethoxy]-2',6'-dimethylbiphenyl-3-yl}methanol

Product 1

HCID 59342557methyl[(3S)-6-({4'-[2-(ethylthio)ethoxy]-2',6'-dimethylbiphenyl-3-yl}methoxy)-2,3-dihydro-1-benzofuran-3-yl]acetateYield 60%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8058HexaneSolvent

Procedure

A solution of methyl [(3S)-6-hydroxy-2,3-dihydro-1-benzofuran-3-yl]acetate (0.250 g, 1.20 mmol), {4′-[2-(ethylthio)ethoxy]-2′,6′-dimethylbiphenyl-3-yl}methanol (0.380 g, 1.20 mmol) and tributylphosphine (0.388 g, 1.92 mmol) in toluene (20 mL) was stirred, 1,1′-(azodicarbonyl)dipiperidine (0.484 g, 1.92 mmol) was added, and the mixture was stirred at room temperature for 1 hr under nitrogen atmosphere. Hexane (10 mL) was added to the reaction mixture, the precipitated insoluble substance was filtered off, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:hexane=5:95-40:60) to give the title compound (0.363 g, yield 60%) as a pale-yellow oil.

Workup

  1. filtrationthe precipitated insoluble substance was filtered off
  2. concentrationthe filtrate was concentrated under reduced pressure
  3. customThe residue was purified by silica gel column chromatography (ethyl acetate:hexane=5:95-40:60)

Sources & evidence

ORD record
ord-83adaaaaf325450880002d43fe0da15a
Source dataset
uspto-grants-2013_12
Patent number
US08598226B2

Reaction notes

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