Cesium carbonate → HCID 67465323, compound

HRID 2171209Notes

Reaction equation

HRID 2171209 reaction equation
CC1(C)C(C)(C)OB([C:9]2[CH:10]=[C:11]3[C:15](=[CH:16][CH:17]=2)[C:14](=[O:18])[CH2:13][CH2:12]3)O1.C(=O)([O-])[O-].[Cs+].[Cs+].Br[C:27]1[CH:32]=[CH:31][C:30]([O:33][CH3:34])=[C:29]([O:35][CH2:36][CH:37]2[CH2:39][CH2:38]2)[C:28]=1[O:40][CH3:41]>O1CCOCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:37]1([CH2:36][O:35][C:29]2[C:28]([O:40][CH3:41])=[C:27]([C:9]3[CH:10]=[C:11]4[C:15](=[CH:16][CH:17]=3)[C:14](=[O:18])[CH2:13][CH2:12]4)[CH:32]=[CH:31][C:30]=2[O:33][CH3:34])[CH2:38][CH2:39]1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 185417105-(tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-inden-1-oneHCID 67461721HCID 67461721, compound

Product 1

HCID 67465323HCID 67465323, compoundYield 42.8%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
85 °C

Procedure

A solution of 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-inden-1-one (180 mg, 0.69 mmol) in dioxane (25 mL) was purged with argon for 1 h, to this was added cesium carbonate (672 mg, 2.07 mmol), Pd(PPh3)4 (40 mg, 0.034 mmol) and 1-bromo-3-(cyclopropylmethoxy)-2,4-dimethoxybenzene (200 mg, 0.69 mmol) and the resultant reaction mixture was heated to 80-90° C. for 16 h. The reaction mixture was cooled to RT, filtered through celite and the filtrate was diluted with water and extracted with ethyl acetate (3×). The combined ethyl acetate layers were washed with brine, dried over anhydrous sodium sulphate and concentrated under reduced pressure. Purification of the residue by column chromatography (silica gel, 0-10% ethyl acetate in pet ether) afforded the title compound as a solid (100 mg and 42.3%).

Workup

  1. customthe resultant reaction mixture
  2. temperatureThe reaction mixture was cooled to RT
  3. filtrationfiltered through celite
  4. additionthe filtrate was diluted with water
  5. extractionextracted with ethyl acetate (3×)
  6. washThe combined ethyl acetate layers were washed with brine
  7. dry with materialdried over anhydrous sodium sulphate
  8. concentrationconcentrated under reduced pressure
  9. customPurification of the residue by column chromatography (silica gel, 0-10% ethyl acetate in pet ether)

Sources & evidence

ORD record
ord-7e88d04013ee45adbd57e24113e25a02
Source dataset
uspto-grants-2015_06
Patent number
US09051290B2

Reaction notes

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