1-Octyne → 3-(1-Boc-2-(s)-pyrrolidinylmethoxy)-5-octynylpyridine

HRID 365876Notes

Reaction equation

HRID 365876 reaction equation
[C:1]([N:8]1[CH2:12][CH2:11][CH2:10][C@H:9]1[CH2:13][O:14][C:15]1[CH:16]=[N:17][CH:18]=[C:19](Br)[CH:20]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[CH:22]#[C:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH3:29]>C(Cl)Cl.CCN(CC)CC.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.Cl[Pd]Cl.[Cu]I>[C:1]([N:8]1[CH2:12][CH2:11][CH2:10][C@H:9]1[CH2:13][O:14][C:15]1[CH:16]=[N:17][CH:18]=[C:19]([C:22]#[C:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH3:29])[CH:20]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2]

Participants

7

Reactant 2

HCID 123701-OctyneHCID 15480235(S)-2-((5-Bromopyridin-3-yloxy)methyl)pyrrolidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 698315063-(1-Boc-2-(s)-pyrrolidinylmethoxy)-5-octynylpyridineYield 79%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 6102075Dichlorobis(triphenylphosphine)palladiumCatalystHCID 6344DichloromethaneSolventHCID 8471TriethylamineSolvent

Procedure

To a solution of 3-(1-BOC-2-(S)-pyrrolidinylmethoxy)-5-bromopyridine (300 mg, 0.84 mmol) in CH2Cl2 (10 mL) and NEt3 (0.4 mL) was added bis(triphenylphosphine)palladium (II) chloride (20 mg, 0.028 mmol), copper (1) iodide (2 mg) and 1-octyne (0.25 mL. 1.7 mmol). The reaction mixture was stirred and refluxed under N2 atmosphere for two days and then cooled to room temperature. After washing with aqueous 10% NaOH (1X), the organic layer was dried (MgSO4), concentrated and chromatographed (silica gel; hexane/EtOAc, 10: 1 to 10:2) to afford an oil (255 mg, 79%): 1H NMR (CDCl3, 300 MHz) δ0.88 (t, 3H, J=2.5 Hz), 1.20-1.38 (m, 4H), 1.42 (d, 4H, J=2.5 Hz), 1.44 (s, 9H), 1.90 (m, 1H), 2.00 (m, 1H), 2.40 (t, 2H, J=7.0 Hz), 3.12 (q, 4H, J=7.5 Hz), 3.32-3.44 (m, 2H), 3.90 (br, 1H), 4.08-4.20 (m, 2H), 7.10 (s, 1H), 8.08-8.30 (m, 2H); MS (CI/NH3) m/z 387 (M+H)+.

Workup

  1. temperaturerefluxed under N2 atmosphere for two days
  2. washAfter washing with aqueous 10% NaOH (1X)
  3. dry with materialthe organic layer was dried (MgSO4)
  4. concentrationconcentrated
  5. customchromatographed (silica gel; hexane/EtOAc, 10: 1 to 10:2)

Sources & evidence

ORD record
ord-2b758ddecb8b4fa29333010b9bbbbfd8
Source dataset
uspto-grants-2000_10
Patent number
US06127386

Reaction notes

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