Triethylamine → 3-Methanesulfonyl-5-triethoxyprop-1-ynyl-pyridine

HRID 24031Notes

Reaction equation

HRID 24031 reaction equation
Br[C:2]1[CH:3]=[N:4][CH:5]=[C:6]([S:8]([CH3:11])(=[O:10])=[O:9])[CH:7]=1.[CH2:12]([O:14][C:15]([O:21][CH2:22][CH3:23])([O:18][CH2:19][CH3:20])[C:16]#[CH:17])[CH3:13].C(N(CC)CC)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I.ClCCl>[CH3:11][S:8]([C:6]1[CH:5]=[N:4][CH:3]=[C:2]([C:17]#[C:16][C:15]([O:18][CH2:19][CH3:20])([O:14][CH2:12][CH3:13])[O:21][CH2:22][CH3:23])[CH:7]=1)(=[O:10])=[O:9]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 109209723,3,3-Triethoxyprop-1-yneHCID 223919813-Bromo-5-(methanesulfonyl)pyridine

Product 1

HCID 225703163-Methanesulfonyl-5-triethoxyprop-1-ynyl-pyridineYield 87.3%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of 3-bromo-5-methanesulfonyl-pyridine (1.00 g, 4.20 mmol), 3,3,3-triethoxypropyne (1.75 g, 9.4 mmol), dichlorobis(triphenylphospine)palladium(II) (0.15 g, 0.21 mmol), copper(I)iodide (0.08 g, 0.42 mmol), triethylamine (1.80 mL, 12.7 mmol) and dichloromethane (40 mL) was heated at reflux for 48 h. The mixture was cooled to room temperature and the solvent was removed under reduced pressure. The crude product was chromatographed on silica (30% ethyl acetate/hexanes) to give the title compound (1.2 g, 87% yield) as yellow solid. 1H NMR (CDCl3) δ 9.08(d, 1H, J=2.4 Hz), 8.91 (d, 1H J=2.0), 8.28 (t, 1H, J=2.0 Hz), 3.75 (q, 6H, J=7.2), 3.13 (s, 3H), 1.29 (t, 9H, J=7.2).

Workup

  1. temperatureat reflux for 48 h
  2. customthe solvent was removed under reduced pressure
  3. customThe crude product was chromatographed on silica (30% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-684970c42d5d40fd89b52f927e8153d0
Source dataset
uspto-grants-2005_02
Patent number
US06855722B2

Reaction notes

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