tert-Butyl acrylate → tert-butyl (E)-3-(2-oxo-2,3-dihydro-1H-indol-5-yl)acrylate

HRID 18241

Reaction equation

HRID 18241 reaction equation
Br[C:2]1[CH:3]=[C:4]2[CH2:10][C:9](=[O:11])[NH:8][C:5]2=N[CH:7]=1.[C:12]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])(=[O:15])[CH:13]=[CH2:14].[C:21]1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C.C(N(C(C)C)CC)(C)C>C(#N)CC.CN(C=O)C.CC([O-])=O.CC([O-])=O.[Pd+2]>[O:11]=[C:9]1[CH2:10][C:4]2[C:5](=[CH:21][CH:7]=[C:2](/[CH:14]=[CH:13]/[C:12]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH:3]=2)[NH:8]1

Participants

8

Reactant 4

HCID 15458tert-Butyl acrylateHCID 80271Tri-o-tolylphosphineHCID 81531DiisopropylethylamineHCID 155040625-bromo-1H,2H,3H-pyrrolo(2,3-b)pyridin-2-one

Product 1

HCID 66905345tert-butyl (E)-3-(2-oxo-2,3-dihydro-1H-indol-5-yl)acrylateYield 162.4%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 6228DimethylformamideSolventHCID 7854PropionitrileSolvent

Procedure

A solution of 5-bromo-1,3-dihydropyrrolo[2,3-b]pyridin-2-one (2.0 g, 9.49 mmole), tert-butyl acrylate (1.8 g, 14.1 mmole), Pd(OAc)2 (0.32 g, 1.4 mmole), tri-ortho-tolylphosphine (0.57 g, 1.9 mmole), and diisopropylethylamine (4.9 mL, 28.2 mmole) in propionitrile (100 mL) and DMF (10 mL) was heated at reflux overnight. The dark mixture was filtered through Celite®, and the filtrate was concentrated. Flash chromatography on silica (9:1 CHCl3/CH3OH containing 5% NH4OH) gave the title compound (0.80 g, 33%) as a light yellow solid. MS (ES) m/e 261 (M+H)+.

Workup

  1. temperatureat reflux overnight
  2. filtrationThe dark mixture was filtered through Celite®
  3. concentrationthe filtrate was concentrated

Sources & evidence

ORD record
ord-dc079d50c56847c69bbdaca74f76ae5d
Source dataset
uspto-grants-2010_06
Patent number
US07741339B2

Linked notes

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