[EN] PROCESS FOR THE PREPARATION OF 2-(ARYLOXYMETHYL)-2,5,7,8-TETRAMETHYLCHROMAN-6-OLS<br/>[FR] PROCEDE DE PREPARATION DE 2-(ARYLOXYMETHYL)-2,5,7,8-TETRAMETHYLCHROMAN-6-OLS
申请人:SANKYO CO
公开号:WO2000010994A1
公开(公告)日:2000-03-02
2-(Aryloxymethyl)-2,5,7,8-tetramethylchroman-6-ols of formula (I) , in which R?1, R2, R3, R4 and R5¿ independently of one another are each hydrogen, C¿1-4?-alkyl, C1-4-alkoxy, 1-di(C1-4-alkoxy)-C1-4-alkyl, 1,3-dioxolan-2-yl, 1,3-dioxan-2-yl, 2-(C1-3-alkyl)-1,3-dioxolan-2-yl, 2-(C1-3-alkyl)-1,3-dioxan-2-yl, halogen or amino, or are a C1-4-alkyl group substituted by an aromatic or nonaromatic isocyclic or heterocyclic ring system, are prepared from 2-methyl-2-phenethyloxiranes and the correspondingly substituted phenols in three stages. The title compounds are pharmaceutical active ingredients or intermediates for the preparation of such active ingredients.