Reacción #62386

Ecuación de reacción

ethanol

3-iodo-1-trityl-1H-pyrazolo[3,4-c]pyridine-5-carbonitrile

lithium hydroxide

hydrochloric acid

→

title compound

3-Iodo-1-trityl-1H-pyrazolo[3,4-c]pyridine-5-carboxylic acid

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaheated
2. 2
   Temperaturaat reflux for a day
3. 3
   Filtraciónthe precipitated crystals were collected by filtration
4. 4
   LavadoThe crystals were washed successively with water and diethyl ether

Procedimiento

To a suspension of 3.0 g of 3-iodo-1-trityl-1H-pyrazolo[3,4-c]pyridine-5-carbonitrile obtained by Production example 431 in 20 mL of ethanol was added 20 mL of 4N lithium hydroxide aqueous solution at room temperature, and heated at reflux for a day. After cooling to room temperature, the solution was neutralized with 5N hydrochloric acid aqueous solution, and the precipitated crystals were collected by filtration. The crystals were washed successively with water and diethyl ether, to afford 3.0 g of the title compound as colorless crystals.

Fuente