[EN] EFFICIENT SCALABLE SYNTHESES OF ABSCISIC ACID, 8'-ACETYLENE ABSCISIC ACID AND 8'-CYCLOPROPYL ABSCISIC ACID<br/>[FR] SYNTHÈSES ÉVOLUTIVES EFFICACES DE L'ACIDE ABSCISSIQUE, DE L'ACIDE 8'-ACÉTYLÈNE-ABSCISSIQUE ET DE L'ACIDE 8'-CYCLOPROPYLABSCISSIQUE
申请人:NAT RES COUNCIL CANADA
公开号:WO2018157225A1
公开(公告)日:2018-09-07
Methods are provided for synthesis of abscisic acid and 8' analogues thereof (including an enantiopure 8'-acetylene analogue) including methods wherein the previously reported first step of oxidation of 2,6-dimethylphenol (VI) to 2,6- dimethylbenzoquinone, mono ketal (VII) is replaced by a novel two step process comprising (i) oxidation of 2,6-dimethylphenol (VI) using potassium peroxymonosulfate with a catalytic amount of iodobenzene to produce 2,6- dimethylbenzoquinone (XVI) and (ii) ketalization of 2,6-dimethylbenzoquinone (XVI) using ethylene glycol, trimethylorthoformate with a catalytic amount of p- toluenesulfonic acid to produce 2,6- dimethylbenzoquinone, mono ketal (VII).
提供了合成脱落酸及其8'类似物(包括对映纯的8'-乙炔类似物)的方法,其中包括将先前报道的2,6-二甲基苯酚(VI)氧化为2,6-二甲基苯醌,单缩酮(VII)的第一步氧化步骤替换为新颖的两步过程的方法,包括(i)使用过氧单硫酸钾和少量碘苯氧化2,6-二甲基苯酚(VI)以产生2,6-二甲基苯醌(XVI),以及(ii)使用乙二醇、三甲基正甲酸酯和少量对甲苯磺酸催化剂缩酮化2,6-二甲基苯醌(XVI)以产生2,6-二甲基苯醌,单缩酮(VII)。