N,N-Dimethylpropargylamine → (E)-3-[4-(3-dimethylamino-prop-1-ynyl)-phenyl]-3-phenyl-acrylic acid ethyl ester

HRID 1810694Notes

Reaction equation

HRID 1810694 reaction equation
[CH2:1]([O:3][C:4](=[O:20])/[CH:5]=[C:6](/[C:13]1[CH:18]=[CH:17][C:16](Br)=[CH:15][CH:14]=1)\[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)[CH3:2].[CH3:21][N:22]([CH3:26])[CH2:23][C:24]#[CH:25]>[Pd](Cl)Cl.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Cu]I.ClCCl>[CH2:1]([O:3][C:4](=[O:20])/[CH:5]=[C:6](/[C:13]1[CH:18]=[CH:17][C:16]([C:25]#[C:24][CH2:23][N:22]([CH3:26])[CH3:21])=[CH:15][CH:14]=1)\[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)[CH3:2]

Participants

6

Reactant 2

HCID 81643N,N-DimethylpropargylamineHCID 20768012(E)-3-(4-bromo-phenyl)-3-phenyl-acrylic acid ethyl ester

Product 1

HCID 67145970(E)-3-[4-(3-dimethylamino-prop-1-ynyl)-phenyl]-3-phenyl-acrylic acid ethyl ester

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 6102075Dichlorobis(triphenylphosphine)palladiumCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of (E)-3-(4-bromo-phenyl)-3-phenyl-acrylic acid ethyl ester (0.728 g, 2.2 mmol), dimethyl-prop-2-ynyl-amine (0.56 ml, 6.58 mmol), bis(triphenylphosphine) palladium(II) chloride (0.061 g, 0.088 mmol), copper(I) iodide (1.25 mg, 0.0065 mmol) in dry triethyllamine (7 ml) were heated to 100° C. by microwave irradiation for 20 min. To the cooled reaction mixture was added dichloromethane (20 ml) and silica gel Fluka 60 (5 g) and the reaction mixture was evaporated in vacuo. The residue was purified by ISCO combiflash 16 (silica gel, hexane/ethyl acetate 85:15) giving (E)-3-[4-(3-dimethylamino-prop-1-ynyl)-phenyl]-3-phenyl-acrylic acid ethyl ester as an oil.

Workup

  1. customTo the cooled reaction mixture
  2. customthe reaction mixture was evaporated in vacuo
  3. customThe residue was purified by ISCO combiflash 16 (silica gel, hexane/ethyl acetate 85:15)

Sources & evidence

ORD record
ord-bb30fc0fd92b4aabbcc9b5bb2b30cd14
Source dataset
uspto-grants-2013_01
Patent number
US08362016B2

Reaction notes

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