Reacción #71004

Ecuación de reacción

O-methyl-N-[1-(2,2,4-trimethyl-cyclohex-3-enyl)-ethyl]-hydroxylamine

triethylamine

3-difluoromethyl-1-methyl-1H-pyrazole-4-carbonyl chloride

→

3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid methoxy-[1-(2,2,4-trimethyl-cyclohex-3-enyl)-ethyl]-amide

Rendimiento 66.0%

Disolventes

dichloromethane

Condiciones de reacción

Tratamiento posterior

1. 1
   ConcentraciónThe mixture was concentrated to an oil which
2. 2
   Lavadowas subject to flash-master column chromatography (elution gradient: cyclohexane/ethyl acetate 99:1 to 1:99)

Procedimiento

To a stirred solution of O-methyl-N-[1-(2,2,4-trimethyl-cyclohex-3-enyl)-ethyl]-hydroxylamine (diastereomer A), prepared as described in example P7, (88 mg; 0.45 mmol) and triethylamine (75 μl; 0.54 mmol) in dichloromethane (2 ml) was added dropwise 3-difluoromethyl-1-methyl-1H-pyrazole-4-carbonyl chloride (87 mg; 0.45 mmol). The reaction mixture was stirred at 24° C. for 16 h under nitrogen atmosphere. The mixture was concentrated to an oil which was subject to flash-master column chromatography (elution gradient: cyclohexane/ethyl acetate 99:1 to 1:99) to afford 106 mg (66% of theory) of 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid methoxy-[1-(2,2,4-trimethyl-cyclohex-3-enyl)-ethyl]-amide as an amorph solid.

Fuente