Tetramethyltin → HCID 68427846, compound

HRID 642570Notes

Reaction equation

HRID 642570 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9](Br)=[N:8][C:7]=1[CH2:12][N:13]([CH2:20][C:21]1[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][C:22]=1[O:29][CH3:30])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:5])[CH3:2].[CH3:31][Sn](C)(C)C>CN(C=O)C.C(OCC)(=O)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]([CH3:31])=[N:8][C:7]=1[CH2:12][N:13]([CH2:20][C:21]1[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][C:22]=1[O:29][CH3:30])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:5])[CH3:2]

Participants

6

Reactant 2

HCID 11661TetramethyltinHCID 684264542-Bromo-4-{[(2,4-dimethoxy-benzyl)-ethoxycarbonylmethyl-amino]-methyl}-thiazole-5-carboxylic acid ethyl ester

Product 1

HCID 68427846HCID 68427846, compound

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 2-Bromo-4-{[(2,4-dimethoxy-benzyl)-ethoxycarbonylmethyl-amino]-methyl}-thiazole-5-carboxylic acid ethyl ester (4 g, 8 mmol, example 81(b), tetramethyl tin (3.3 mL, 24 mmol), dichlorobis(triphenylphosphine)palladium II (460 mg, 0.66 mmol) in 50 mL anhydrous DMF was heated to 130° C. for 1 h. The reaction mixture was cooled, diluted with ethyl acetate, and washed successively with water, saturated sodium bicarbonate, and brine. The organic fraction was dried over anhydrous sodium sulfate, concentrated to a crude residue and purified by column chromatography (eluting from silica gel with a gradient of 15-60% ethyl acetate in hexanes) to give 3.13 mg of the title compound. MS (ESI+): m/z 436.8 (M+1).

Workup

  1. temperatureThe reaction mixture was cooled
  2. washwashed successively with water, saturated sodium bicarbonate, and brine
  3. dry with materialThe organic fraction was dried over anhydrous sodium sulfate
  4. concentrationconcentrated to a crude residue
  5. custompurified by column chromatography (
  6. washeluting from silica gel with a gradient of 15-60% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-2f5d7009f9894c1fb2a3e9310c436d4e
Source dataset
uspto-grants-2010_04
Patent number
US07696223B2

Reaction notes

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