Methyl iodide → 5-(3,3-dimethyl-but-1-ynyl)-3-[N'-methyl-N-(4-methyl-cyclohexanecarbonyl)-N'-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester

HRID 39309Notes

Reaction equation

HRID 39309 reaction equation
[CH3:1][O:2][C:3]([C:5]1[S:6][C:7]([C:27]#[C:28][C:29]([CH3:32])([CH3:31])[CH3:30])=[CH:8][C:9]=1[N:10]([C:18]([CH:20]1[CH2:25][CH2:24][CH:23]([CH3:26])[CH2:22][CH2:21]1)=[O:19])[NH:11][C:12](=[O:17])[C:13]([F:16])([F:15])[F:14])=[O:4].[CH3:33]I>C1COCC1.CCOC(C)=O>[CH3:1][O:2][C:3]([C:5]1[S:6][C:7]([C:27]#[C:28][C:29]([CH3:31])([CH3:30])[CH3:32])=[CH:8][C:9]=1[N:10]([C:18]([CH:20]1[CH2:21][CH2:22][CH:23]([CH3:26])[CH2:24][CH2:25]1)=[O:19])[N:11]([CH3:33])[C:12](=[O:17])[C:13]([F:16])([F:14])[F:15])=[O:4]

Participants

5

Reactant 2

HCID 6328Methyl iodideHCID 866555955-(3,3-dimethyl-but-1-ynyl)-3-[N-(4-methyl-cyclohexanecarbonyl)-N'-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester

Product 1

HCID 866555965-(3,3-dimethyl-but-1-ynyl)-3-[N'-methyl-N-(4-methyl-cyclohexanecarbonyl)-N'-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 5-(3,3-dimethyl-but-1-ynyl)-3-[N-(4-methyl-cyclohexanecarbonyl)-N′-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester (1.6 g, 3.4 mmol) in THF (17 mL) was added K-OtBu (4.1 mmol, 1.0 M in THF), followed by MeI (1.0 g, 6.8 mmol). After stirring at rt for 16 h the reaction was diluted with EtOAc washed once with 20 mL of brine and purified by silica gel chromatography 0-20% EtOAc/hexanes to give 5-(3,3-dimethyl-but-1-ynyl)-3-[N′-methyl-N-(4-methyl-cyclohexanecarbonyl)-N′-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester. This was then diluted with EtOAc (20 mL) and treated with NaOH (6.8 mL of 2M aq solution) to give 5-(3,3-Dimethyl-but-1-ynyl)-3-[N′-methyl-N-(4-methyl-cyclohexanecarbonyl)-hydrazino]-thiophene-2-carboxylic acid.

Workup

  1. washwashed once with 20 mL of brine
  2. custompurified by silica gel chromatography 0-20% EtOAc/hexanes

Sources & evidence

ORD record
ord-cff6c3070fb64a96a52b6ac3e07770f4
Source dataset
uspto-grants-2013_09
Patent number
US08524764B2

Reaction notes

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