Preparation of crude candesartan cilexetil

Details Preparation of crude candesartan cilexetil Preparation of crude candesartan cilexetil

C - Chemistry, Metallurgy

07

D

C07D 403/10 (2006.01)

Patent

CA 2590894

A process for preparing candesartan cilexetil comprising heating a solution of trityl candesartan cilexetil in a water immiscible solvent in the presence of at least one C1-C4 alcohol and a first portion of water; combining the solution with a second portion of water to obtain a two-phase system; and recovering candesartan cilexetil.

L'invention concerne un procédé de préparation de candesartan cilexetil. Ce procédé consiste à chauffer une solution de trityl candesartan cilexetil dans un solvant non miscible dans l'eau, en présence d'au moins un alcool C1-C4 et d'une première quantité d'eau; à combiner la solution avec une seconde quantité d'eau pour obtenir un système biphasique; et à extraire le candesartan cilexetil.

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