Reaktion #67586

Reaktionsgleichung

5-(3,3-dimethyl-but-1-ynyl)-3-[N′-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester

4-methyl-cyclohexanecarbonyl chloride

→

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

Ausbeute 96.7%

Lösungsmittel

DCE

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter cooling
2. 2
   Einengenthe mixture was concentrated
3. 3
   Sonstigethe product was purified by silica gel chromatography 0-30% EtOAc/hexanes

Vorschrift

A mixture of 5-(3,3-dimethyl-but-1-ynyl)-3-[N′-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester (2.1 g, 6.0 mmol), 4-methyl-cyclohexanecarbonyl chloride (1.45 g, 9 mmol), DMAP (1.1 g, 9 mmol) and DCE (20 mL) was heated to 40° C. for 16 h. After cooling, the mixture was concentrated and the product was purified by silica gel chromatography 0-30% EtOAc/hexanes to give 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 (2.74 g, 5.8 mmol).

Quelle