[EN] NEW TRICYCLIC DERIVATIVES AS LTD4 ANTAGONISTS<br/>[FR] NOUVEAUX DERIVES TRICYCLIQUES EN TANT QU'ANTAGONISTES DE LTD4
申请人:ALMIRALL PRODESFARMA SA
公开号:WO2004043966A1
公开(公告)日:2004-05-27
Compounds of formula (I) and their pharmaceutically acceptable salts are provided as well as processes for the manufacture of such compounds. The compounds are useful in the treatment or prevention of inflammatory and allergic diseases.
and efficient three-step sequence for the deamination of α-aminoesters is reported. This method is based on the NaBH4-mediated selective reduction of α-diazoesters to α-hydrazonoesters and has been successfully applied to the deamination of several representative α-aminoesters including some l-cysteine ethyl ester derivatives, key intermediates in the synthesis of a series of CysLT1 antagonists.