Abstract
A simple and convenient two-step method for the synthesis of the title compound 1 was developed using N-protected 4-pyrazolilmagnesium bromide 9 as a key intermediate. Laborious procedures for purification or isolation of target compound are not required, therefore, up to 20 g of 1 could be obtained in a single run.
ACKNOWLEDGMENT
We are grateful to ArtChem GmbH (Campus Berlin-Buch, Germany) for the support of this work.