Tributylphosphine → HCID 121386221, compound

HRID 2203003Notes

Reaction equation

HRID 2203003 reaction equation
[CH:1]1([C:4]2[N:5]=[C:6]3[CH:11]=[CH:10][C:9]([N:12]4[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]4=[O:19])=[CH:8][N:7]3[C:20]=2[CH3:21])[CH2:3][CH2:2]1.[Br:22][C:23]1[S:27][CH:26]=[C:25]([CH2:28]O)[CH:24]=1.C(P(CCCC)CCCC)CCC.N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O>C1COCC1>[Br:22][C:23]1[S:27][CH:26]=[C:25]([CH2:28][O:18][C:15]2[CH:16]=[CH:17][N:12]([C:9]3[CH:10]=[CH:11][C:6]4[N:7]([C:20]([CH3:21])=[C:4]([CH:1]5[CH2:3][CH2:2]5)[N:5]=4)[CH:8]=3)[C:13](=[O:19])[CH:14]=2)[CH:24]=1

Participants

6

Reactant 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 19006171(5-Bromothiophen-3-yl)methanolHCID 896902811-(2-Cyclopropyl-3-methylimidazo[1,2-a]pyridin-6-yl)-4-hydroxypyridin-2(1H)-one

Product 1

HCID 121386221HCID 121386221, compoundYield 26.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of 1-(2-cyclopropyl-3-methylimidazo[1,2-a]pyridin-6-yl)-4-hydroxypyridin-2(1H)-one (87 mg), (5-bromo-3-thienyl)methanol (119 mg) and tributylphosphine (188 mg) in THF (4 ml) was added 1,1′-(azodicarbonyl)dipiperidine (234 mg), and the reaction mixture was stirred at 60° C. for 3 h. The reaction mixture was then cooled to room temperature, concentrated, and purified by silica gel column chromatography (hexane/EtOAc then MeOH/EtOAc). The resulting solid was recrystallized from EtOH/hexane to give the title compound (38 mg) as a white solid.

Workup

  1. temperatureThe reaction mixture was then cooled to room temperature
  2. concentrationconcentrated
  3. custompurified by silica gel column chromatography (hexane/EtOAc
  4. customThe resulting solid was recrystallized from EtOH/hexane

Sources & evidence

ORD record
ord-c5595bf1044f4147a228359b132a80f1
Source dataset
uspto-grants-2016_06
Patent number
US09365540B2

Reaction notes

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