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Cesium carbonate → 4-(4-Chloro-2-fluorophenyl)-2-methylnicotinaldehyde

HRID 2369553
Notes
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Reaction equation

HRID 2369553 reaction equation
Cl[C:2]1[C:7]([CH:8]=[O:9])=[C:6]([CH3:10])[N:5]=[CH:4][CH:3]=1.[Cl:11][C:12]1[CH:17]=[CH:16][C:15](B(O)O)=[C:14]([F:21])[CH:13]=1.C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.CCOC(C)=O.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:11][C:12]1[CH:17]=[CH:16][C:15]([C:2]2[C:7]([CH:8]=[O:9])=[C:6]([CH3:10])[N:5]=[CH:4][CH:3]=2)=[C:14]([F:21])[CH:13]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

8

Reactant 3

HCID 10796Cesium carbonateHCID 4193595(4-Chloro-2-fluorophenyl)boronic acidHCID 72211849HCID 72211849, compound

Product 1

HCID 866959504-(4-Chloro-2-fluorophenyl)-2-methylnicotinaldehydeYield 93.5%

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compound
Catalyst
HCID 962WaterSolvent
HCID 1140TolueneSolvent
HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of 4-chloro-2-methylnicotinaldehyde (100 mg, 0.643 mmol), (4-chloro-2-fluorophenyl)boronic acid (123 mg, 0.707 mmol), Cs2CO3 (628 mg, 1.928 mmol) and Pd(Ph3P)4 (52.0 mg, 0.045 mmol) in toluene (5 mL) was heated at 90° C. for 16 h. After cooling, the reaction mixture was diluted with EtOAc (10 mL) and water (10 mL). The ethyl acetate layer was concentrated and purified by silica gel chromatography (2:1 Hexane-EtOAc) to afford 4-(4-chloro-2-fluorophenyl)-2-methylnicotinaldehyde (0.15 g, 0.601 mmol, 35% yield) as a yellow solid. LCMS (ESI) m/e 250.04 [(M+H)+, calcd for C13H10ClFNO 250.0]; LC/MS retention time (Method G): tR=0.96 min.

Workup

  1. temperatureAfter cooling
  2. concentrationThe ethyl acetate layer was concentrated
  3. custompurified by silica gel chromatography (2:1 Hexane-EtOAc)

Sources & evidence

ORD record
ord-295d781671c44329bbb0146eaec585aa
Source dataset
uspto-grants-2014_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08703953B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes