重氮甲烷 、 (1R,3S)-ventiloquinone G 生成 5,10-Dihydroxy-7-methoxy-1,3-dimethyl-3,4-dihydro-1H-benzo[g]isochromene-6,9-dione
参考文献:
名称:
风叶植物中的苯并异色满醌
摘要:
摘要 从马德拉斯帕塔纳风草根皮丙酮提取物中提取出八种新的苯并异色满醌;已分离出ventiloquinones A、B、C、D、E、F、G和H。Ventiloquinones I、J 和 K 是从 V. calyculata 的根皮中分离出的另外三种新的苯并异色满醌。大多数是与eleutherin相关的3,4,5,10-四氢-顺式-1,3-二甲基-1H-萘并[2,3-c]吡喃-5,10-醌,但F、H、I、J和 K 是与万替拉酮相关的 6,9-醌。
Total synthesis of enantiopure 1,3-dimethylpyranonaphthoquinones including ventiloquinones E, G, L and eleutherin
作者:Leonie M. Tewierik、Christian Dimitriadis、Christopher D. Donner、Melvyn Gill、Brendan Willems
DOI:10.1039/b607366b
日期:——
A new synthetic approach to enantiopure pyranonaphthoquinones is described. (S)-Mellein 10, prepared in 6 steps from (S)-propylene oxide 16, is converted stereospecifically to the (1R,3S)-dimethylpyran 15. The pyran 15 is then converted to the benzoquinone 14, which undergoes regiospecific Diels-Alder reactions with a variety of oxygenated butadienes to give pyranonaphthoquinones including ventiloquinones
描述了一种新的对映体纯吡喃并萘醌的合成方法。由(S)-环氧丙烷16分6步制备的(S)-Mellein 10立体定向转化为(1R,3S)-二甲基吡喃15。然后将吡喃15转化为苯醌醌14,并进行区域特异性Diels-与各种含氧丁二烯进行Alder反应,得到吡喃并萘醌,包括ventiloquinones E,G,L,leutherin和ent-deoxyquinone A.