[EN] CHEMICAL PROCESS FOR PREPARING SPIROINDOLONES AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ CHIMIQUE POUR LA PRÉPARATION DE SPIROINDOLONES ET INTERMÉDIAIRES CORRESPONDANTS
申请人:NOVARTIS AG
公开号:WO2013139987A1
公开(公告)日:2013-09-26
The present invention relates to processes and intermediates useful for the manufacture of spiroindolone compounds such as (1'R,3'S)-5,7'-dichloro-6'-fluoro-3'-methyl-2',3',4',9'-tetrahydrospiro[indoline-3,1'-pyrido[3, 4-b]indol]-2-one and salts and hydrates and solvates thereof.
substituent at C-4, we investigated solvolysis reactions of the thiatricycle 2, obtained from spiro[2.4]hepta-4,6-diene (1) and thiophosgene by [4 + 2] cycloaddition. With methanol or ethanol a mixture of the esters 7 and 8 was formed. Desulfurization of the thionoesters 8 gave methyl and ethyl spiro[2.4]hepta-4,6-diene-4-carboxylate (10a,b). The corresponding alcohol (11) was prepared from 10b by LiAlH(4)