4-[(2-Methylbut-3-yn-2-yl)oxy]benzonitrile → Benzyl 2-[3-(4-cyanophenoxy)-3-methyl-1-butyn-1-yl]pyridine-5-carboxylate

HRID 1073918Notes

Reaction equation

HRID 1073918 reaction equation
I[C:2]1[CH:7]=[CH:6][C:5]([C:8]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[O:9])=[CH:4][N:3]=1.[CH3:18][C:19]([CH3:31])([O:22][C:23]1[CH:30]=[CH:29][C:26]([C:27]#[N:28])=[CH:25][CH:24]=1)[C:20]#[CH:21]>C(NCC)C.[Cu]I.[Pd](Cl)Cl.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[C:27]([C:26]1[CH:29]=[CH:30][C:23]([O:22][C:19]([CH3:18])([CH3:31])[C:20]#[C:21][C:2]2[CH:7]=[CH:6][C:5]([C:8]([O:10][CH2:11][C:12]3[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=3)=[O:9])=[CH:4][N:3]=2)=[CH:24][CH:25]=1)#[N:28]

Participants

7

Reactant 2

HCID 27790724-[(2-Methylbut-3-yn-2-yl)oxy]benzonitrileHCID 19895696Benzyl 2-iodopyridine-5-carboxylate

Product 1

HCID 19895702Benzyl 2-[3-(4-cyanophenoxy)-3-methyl-1-butyn-1-yl]pyridine-5-carboxylateYield 74.9%

Reagents, catalysts & solvents 4

HCID 11776TriphenylphosphineCatalystHCID 24290Palladium ChlorideCatalystHCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 8021DiethylamineSolvent

Procedure

12.2 g of benzyl 2-iodopyridine-5-carboxylate and 5.64 g of 4-(1,1-dimethyl-2-propynyloxy)benzonitrile were stirred with 32 mg of copper(I) iodide, 162 mg of triphenylphosphine and 180 mg of palladium(II) chloride in 280 ml of diethylamine at room temperature for 7 days under a nitrogen atmosphere. The mixture was evaporated and the residue was taken up in ethyl acetate and water. The organic phase was separated, dried over sodium sulphate and evaporated. The residue was chromatographed on silica gel using ethyl acetate/petroleum ether (1:4) for the elution. There were obtained 9.04 g of benzyl 2-[3-(4-cyanophenoxy)-3-methyl-1-butyn-1-yl]pyridine-5-carboxylate which was used without further purification.

Workup

  1. customThe mixture was evaporated
  2. customThe organic phase was separated
  3. dry with materialdried over sodium sulphate
  4. customevaporated
  5. customThe residue was chromatographed on silica gel
  6. washfor the elution

Sources & evidence

ORD record
ord-8614dd0ab5c04322b44c419a256b1f64
Source dataset
uspto-grants-1990_11
Patent number
US04971982

Reaction notes

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