Sodium Carbonate → 4-(6-Phenylpyrazolo[1,5-a]pyrimidin-5-yl)benzaldehyde

HRID 503742Notes

Reaction equation

HRID 503742 reaction equation
Cl[C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[CH:6][N:5]2[N:14]=[CH:15][CH:16]=[C:4]2[N:3]=1.[CH:17]([C:19]1[CH:24]=[CH:23][C:22](B(O)O)=[CH:21][CH:20]=1)=[O:18].C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.O.ClCCl.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[C:8]1([C:7]2[C:2]([C:22]3[CH:23]=[CH:24][C:19]([CH:17]=[O:18])=[CH:20][CH:21]=3)=[N:3][C:4]3[N:5]([N:14]=[CH:15][CH:16]=3)[CH:6]=2)[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1

Participants

8

Reactant 3

HCID 10340Sodium CarbonateHCID 5910734-Formylphenylboronic AcidHCID 866306645-Chloro-6-phenylpyrazolo[1,5-a]pyrimidine

Product 1

HCID 866306654-(6-Phenylpyrazolo[1,5-a]pyrimidin-5-yl)benzaldehyde

Reagents, catalysts & solvents 4

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 6344DichloromethaneSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
80 °C

Procedure

To a mixture of 300 mg of the mixture from step 3 and 360 mg 4-formylphenylboronic acid in 9 ml 1,2-dimethoxyethane are added 1.8 ml of a 10% w/w sodium carbonate solution and 36 mg dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II) and the resulting mixture is heated to 80° C. under an inert gas atmosphere for 18 h. The work up is performed by diluting the reaction mixture with water and dichloromethane, separating the phases and extraction of the aqueous phase with dichloromethane. The combined organic layers are dried over sodium sulphate, evaporated and the residue is purified by chromatography on silica gel (dichloromethane/methanol). The product is crystallized from ethyl acetate.

Workup

  1. customseparating
  2. extractionthe phases and extraction of the aqueous phase with dichloromethane
  3. dry with materialThe combined organic layers are dried over sodium sulphate
  4. customevaporated
  5. customthe residue is purified by chromatography on silica gel (dichloromethane/methanol)
  6. customThe product is crystallized from ethyl acetate

Sources & evidence

ORD record
ord-0d07106262b347b084291447f152a115
Source dataset
uspto-grants-2010_08
Patent number
US07776864B2

Reaction notes

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