1,2-Dimethoxyethane → HCID 59496796, compound

HRID 416986Notes

Reaction equation

HRID 416986 reaction equation
[CH2:1]([O:3][C:4](=[O:39])[CH2:5][CH2:6][CH2:7][O:8][C:9]1[CH:14]=[CH:13][CH:12]=[C:11]([CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][O:21][C:22]2[CH:27]=[C:26]([O:28][CH2:29][CH3:30])[CH:25]=[C:24](Br)[CH:23]=2)[C:10]=1[CH2:32][CH2:33][C:34]([O:36][CH2:37][CH3:38])=[O:35])[CH3:2].[CH2:40]1[O:48][C:47]2[CH:46]=[CH:45][C:44](B(O)O)=[CH:43][C:42]=2[O:41]1.C(=O)([O-])[O-].[Cs+].[Cs+].C(COC)OC>O.C(OCC)(=O)C.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH2:1]([O:3][C:4](=[O:39])[CH2:5][CH2:6][CH2:7][O:8][C:9]1[CH:14]=[CH:13][CH:12]=[C:11]([CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][O:21][C:22]2[CH:27]=[C:26]([O:28][CH2:29][CH3:30])[CH:25]=[C:24]([C:45]3[CH:44]=[CH:43][C:42]4[O:41][CH2:40][O:48][C:47]=4[CH:46]=3)[CH:23]=2)[C:10]=1[CH2:32][CH2:33][C:34]([O:36][CH2:37][CH3:38])=[O:35])[CH3:2]

Participants

8

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10796Cesium carbonateHCID 2734371(2H-1,3-benzodioxol-5-yl)boronic acidHCID 59496797HCID 59496797, compound

Product 1

HCID 59496796HCID 59496796, compoundYield 99.7%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
96 °C

Procedure

To a mixture of 4-[3-[6-(3-bromo-5-ethoxy-phenoxy)-hexyl]-2-(2-ethoxycarbonyl-ethyl)-phenoxy]-butyric acid ethyl ester (155 mg, 0.255 mmol), 3,4-methylenedioxybenzeneboronic acid (85 mg, 0.51 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (73 mg, 0.1 mmol), and cesium carbonate (166 mg, 0.51 mmol) was added dimethoxyethane (10 mL) at room temperature under nitrogen atmosphere. The resulting brown reaction mixture was heated to 96° C. and stirred for 15 h at which time the TLC analysis of the reaction mixture indicated the absence of starting material. Then, the reaction mixture was cooled to room temperature and diluted with water (50 mL) and ethyl acetate (50 mL). The two layers were separated and the aqueous layer was extracted with ethyl acetate (50 mL) and the combined organic extracts were washed with water (50 mL) and brine solution (50 mL). The organic layer was dried over anhydrous magnesium sulfate and filtration of the drying agent and removal of the solvent under vacuum gave the colored residue which was purified by using an ISCO 40 column, eluting with 0-25% ethyl acetate in hexanes to obtain 4-[3-[6-(3-benzo[1,3]dioxol-5-yl-5-ethoxy-phenoxy)-hexyl]-2-(2-ethoxycarbonyl-ethyl)-phenoxy]-butyric acid ethyl ester (165 mg, 99%) as a colorless viscous oil: ES(+)-LRMS m/e calcd for C38H48O9 (M+Na)+ 671.3190. found 671.3185.

Workup

  1. temperatureThen, the reaction mixture was cooled to room temperature
  2. customThe two layers were separated
  3. extractionthe aqueous layer was extracted with ethyl acetate (50 mL)
  4. washthe combined organic extracts were washed with water (50 mL) and brine solution (50 mL)
  5. dry with materialThe organic layer was dried over anhydrous magnesium sulfate and filtration of the drying agent and removal of the solvent under vacuum
  6. customgave the colored residue which
  7. customwas purified
  8. washeluting with 0-25% ethyl acetate in hexanes

Sources & evidence

ORD record
ord-e661bfeb2eab433ab513316bdff79087
Source dataset
uspto-grants-2012_01
Patent number
US08088936B2

Reaction notes

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