Water → 1-[5-(5-Chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-5-[2-(2-methoxy-ethoxy)-ethoxymethyl]-1H-pyrazole-3-carboxylic acid ethyl ester

Participants

Reaction Steps

To a solution of 100 mg 1-[5-(5-Chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-5-hydroxymethyl-1H-pyrazole-3-carboxylic acid ethyl ester in 2 ml DMF 11 mg NaH (60% in mineral oil) were added at RT and stirred for 10 min. Then 100 mg 1-Bromo-2-(2-methoxy-ethoxy)-ethane were added and the mixture was stirred for 16 h. After addition of 5 ml of water the mixture was filtered through a chem elut® cartridge by elution with ethyl acetate and then concentrated under reduced pressure. The crude residue was directly subjected to the next reaction step. Yield: 130 mg.

Provenance & Evidence