Water → 6-Thiophen-3-yl-2-(2-trimethylsilanylethoxymethyl)-4-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2H-pyridazin-3-one

HRID 12284

Reaction equation

HRID 12284 reaction equation
Cl[C:2]1[CH:3]=[C:4]([C:17]2[N:21]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[C:20]3[CH:30]=[CH:31][CH:32]=[CH:33][C:19]=3[N:18]=2)[C:5](=[O:16])[N:6]([CH2:8][O:9][CH2:10][CH2:11][Si:12]([CH3:15])([CH3:14])[CH3:13])[N:7]=1.[S:34]1[CH:38]=[CH:37][C:36](B(O)O)=[CH:35]1.C(=O)([O-])[O-].[K+].[K+].O>C(COC)OC>[S:34]1[CH:38]=[CH:37][C:36]([C:2]2[CH:3]=[C:4]([C:17]3[N:21]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:27])[CH3:28])[C:20]4[CH:30]=[CH:31][CH:32]=[CH:33][C:19]=4[N:18]=3)[C:5](=[O:16])[N:6]([CH2:8][O:9][CH2:10][CH2:11][Si:12]([CH3:13])([CH3:14])[CH3:15])[N:7]=2)=[CH:35]1

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 581760Thiophene-3-boronic acidHCID 686802706-chloro-2-(2-trimethylsilanylethoxymethyl)-4-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2H-pyridazin-3-one

Product 1

HCID 686802276-Thiophen-3-yl-2-(2-trimethylsilanylethoxymethyl)-4-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2H-pyridazin-3-one

Reagents, catalysts & solvents 1

HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
85 °C

Procedure

44 mg of 6-chloro-2-(2-trimethylsilanylethoxymethyl)-4-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2H-pyridazin-3-one, 14 mg of thiophene-3-boronic acid and 36 mg of potassium carbonate are dissolved 1.5 ml of a 1:2 mixture of water and dimethoxyethane, and argon is passed through the solution for degassing. Addition of 7 mg of (1,1′-bis(diphenylphosphine) -ferrocene)palladium(II) chloride-dichloromethane complex is followed by stirring at 85° C. for 4 hours. For workup, it is diluted with water and extracted several times with ethyl acetate. The combined organic phases are dried using a silica gel cartridge, and the solvent is distilled off. The crude product is purified by silica gel chromatography (n-heptane/ethyl acetate).

Workup

  1. customfor degassing
  2. additionAddition of 7 mg of (1,1′-bis(diphenylphosphine) -ferrocene)palladium(II) chloride-dichloromethane complex
  3. additionFor workup, it is diluted with water
  4. extractionextracted several times with ethyl acetate
  5. customThe combined organic phases are dried
  6. distillationthe solvent is distilled off
  7. customThe crude product is purified by silica gel chromatography (n-heptane/ethyl acetate)

Sources & evidence

ORD record
ord-89db74143efc4aeca5ac7a1cab291567
Source dataset
uspto-grants-2010_06
Patent number
US07727989B2

Linked notes

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