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Tetrahydrofuran → HCID 11689561, compound

HRID 506275
Notes
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Reaction equation

HRID 506275 reaction equation
[C:1]([Mg]Br)#[C:2][CH3:3].C1COCC1.[N:11]12[CH2:18][CH2:17][CH:14]([CH2:15][CH2:16]1)[CH:13]([NH:19][C:20]([C:22]1[CH:23]=[CH:24][CH:25]=[C:26]3[O:30][C:29]([C:31]4[CH:36]=[CH:35][C:34](I)=[CH:33][CH:32]=4)=[N:28][C:27]=13)=[O:21])[CH2:12]2>CN(C=O)C.[Cl-].[Zn+2].[Cl-].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>[N:11]12[CH2:18][CH2:17][CH:14]([CH2:15][CH2:16]1)[CH:13]([NH:19][C:20]([C:22]1[CH:23]=[CH:24][CH:25]=[C:26]3[O:30][C:29]([C:31]4[CH:36]=[CH:35][C:34]([C:1]#[C:2][CH3:3])=[CH:33][CH:32]=4)=[N:28][C:27]=13)=[O:21])[CH2:12]2
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 3

HCID 8028TetrahydrofuranHCID 11518485HCID 11518485, compoundHCID 178419101HCID 178419101, compound

Product 1

HCID 11689561HCID 11689561, compoundYield 88%

Reagents, catalysts & solvents 3

HCID 3007855ZincchlorideCatalyst
HCID 178418476
HCID 178418476, compound
Catalyst
HCID 6228DimethylformamideSolvent

Procedure

Zinc chloride (1.0 M in ether, 0.33 mL, 0.33 mmol) was added dropwise to a solution of 1-propynylmagnesium bromide in THF (0.5 M in THF, 0.66 mL, 0.33 mmol) at room temperature and the mixture was stirred under nitrogen for 10 min. N-(1-Azabicyclo[2.2.2]oct-3-yl)-2-(4-iodophenyl)benzoxazole-4-carboxamide (50 mg, 0.11 mmol) in DMF (2 mL) was added followed by bis(triphenylphosphine)dichloropalladium(II) (7.7 mg, 0.011 mmol). The resulting mixture was stirred under nitrogen at room temperature for 2 h, and then was quenched with saturated ammonium chloride, extracted with methylene chloride. The combined organic layers were washed with water and brine, dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 90:10:1 ethyl acetate/methanol/concentrated ammonium hydroxide) to afford N-(1-azabicyclo[2.2.2]oct-3-yl)-2-(4-propyn-1-ylphenyl)benzoxazole-4-carboxamide (36 mg, 88%) as a light yellow solid: 1H NMR (300 MHz, CDCl3) δ 9.56 (d, J=7.0 Hz, 1H), 8.23 (dd, J=8.0, 1.0 Hz, 1H), 8.17 (d, J=8.4 Hz, 2H), 7.73 (dd, J=8.0, 1.0 Hz, 1H), 7.58 (d, J=8.4 Hz, 2H), 7.49 (t, J=8.0 Hz, 1H), 4.35-4.29 (m, 1H), 3.54 (ddd, J=14.0, 9.5, 2.0 Hz, 1H), 3.16-2.82 (m, 5H), 2.20-2.03 (m, 2H), 2.14 (s, 3H), 1.80-1.60 (m, 3H); MS (ESI+) m/z 386 (M+H); HPLC>99% (AUC), tR=13.24 min.

Workup

  1. stirringThe resulting mixture was stirred under nitrogen at room temperature for 2 h
  2. customwas quenched with saturated ammonium chloride
  3. extractionextracted with methylene chloride
  4. washThe combined organic layers were washed with water and brine
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe crude material was purified by column chromatography (silica gel, 90:10:1 ethyl acetate/methanol/concentrated ammonium hydroxide)

Sources & evidence

ORD record
ord-bedb136e2357486986809233a2ff0ddc
Source dataset
uspto-grants-2010_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07781430B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes