CAS号77316-40-6 5,7-dimethoxy-k... | CAS号1391144-80-1 oxytroflavoside A | CAS号1391144-89-0 Oxytroflavoside G | CAS号57525-01-6 5-hydroxy-2-(4-... | CAS号59259-80-2 2-(4-hydroxyphe... | CAS号520-18-3 山奈酚
合成工艺路线路线简述
📜山奈酚置于吡啶,咪唑,N-甲基吡咯烷酮,氨,Potassium Carbonate,苯硫酚体系中,用 甲醇,丙酮 作为反应溶剂,化学反应 38.0H,反应生成 鼠李柠檬素 参考文献:Selective Methylation Of Kaempferol Via Benzylation And Deacetylation Of Kaempferol Acetates 标题:Selective Methylation Of Kaempferol Via Benzylation And Deacetylation Of Kaempferol Acetates 摘要:开发了一种选择性对卡培菲醇进行单甲基化,二甲基化和三甲基化的策略,主要基于对卡培菲醇醋酸酯的选择性苄基化和可控的去乙酰化.通过对卡培菲醇四乙酰酸酯(1)的选择性去乙酰化和苄基化,分别得到了3,4',5-三乙酰卡培菲醇(2)和7-苄基-3,4'5-三乙酰卡培菲醇(8).通过可控的去乙酰化,然后对这两种中间体进行选择性或直接的甲基化,从卡培菲醇中总产率为51-77%制备了八种甲基化卡培菲醇. DOI:10.3762/bjoc.11.33
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