Potassium Carbonate → HCID 58017289, compound

HRID 661580Notes

Reaction equation

HRID 661580 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C:10]([C:16]([C:18]2[S:19][C:20](Cl)=[C:21]([Cl:23])[CH:22]=2)=[O:17])([CH2:13][CH2:14][CH3:15])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:25]B1OB(C)OB(C)O1.C(=O)([O-])[O-].[K+].[K+]>O1CCOCC1.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>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C:10]([C:16]([C:18]2[S:19][C:20]([CH3:25])=[C:21]([Cl:23])[CH:22]=2)=[O:17])([CH2:13][CH2:14][CH3:15])[CH2:9]1)=[O:7])([CH3:3])([CH3:4])[CH3:2]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 574072TrimethylboroxineHCID 58017226HCID 58017226, compound

Product 1

HCID 58017289HCID 58017289, compoundYield 87.2%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

A mixture of 3-(4,5-dichloro-thiophene-2-carbonyl)-3-propyl-pyrrolidine-1-carboxylic acid tert-butyl ester (0.2 g, 0.512 mmoles), trimethylboroxine (0.24 g, 1.91 mmoles), potassium carbonate (0.22 g, 1.59 mmoles), and tetrakis(triphenylphosphine)palladium(0) (0.06 g, 0.051 mmoles) in dioxane (10 ml) was refluxed for three hours, then cooled to room temperature. The mixture was filtered through celite and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel chromatography (0 to 10% ethyl acetate in hexane) to yield 3-(4-chloro-5-methyl-thiophene-2-carbonyl)-3-propyl-pyrrolidine-1-carboxylic acid tert-butyl ester as a solid (0.166 g, 87%). M+Na: 394

Workup

  1. temperaturewas refluxed for three hours
  2. filtrationThe mixture was filtered through celite
  3. concentrationthe filtrate was concentrated under reduced pressure
  4. customThe residue was purified by silica gel chromatography (0 to 10% ethyl acetate in hexane)

Sources & evidence

ORD record
ord-a26e728391484ab49c765527c9e18c4f
Source dataset
uspto-grants-2011_12
Patent number
US08084623B2

Reaction notes

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