详细信息
3-羟基哌啶N,O-缩醛的不对称烯丙基化反应及在Epiquinamide和(+)-Febrifugine合成中的应用 ( SCI-EXPANDED收录)
Asymmetric Allylation of N,O-Acetal and Application in the Synthesis of Epiquinamide and (+)-Febrifugine
文献类型:期刊文献
中文题名:3-羟基哌啶N,O-缩醛的不对称烯丙基化反应及在Epiquinamide和(+)-Febrifugine合成中的应用
英文题名:Asymmetric Allylation of N,O-Acetal and Application in the Synthesis of Epiquinamide and (+)-Febrifugine
作者:冯涛[1];司长梅[1];刘如成[1];范翔[2];魏邦国[1]
机构:[1]复旦大学化学系,上海200043;[2]华东理工大学生物工程学院,上海200237
年份:2013
卷号:33
期号:6
起止页码:1291
中文期刊名:有机化学
外文期刊名:Chinese Journal of Organic Chemistry
收录:CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000322053600015)】;北大核心:【北大核心2011】;CSCD:【CSCD2013_2014】;
基金:Project supported by the National Natural Science Foundation of China (Nos. 21272041, 21072034).
语种:中文
中文关键词:N,O-缩醛;烯丙基化;谷氨酸;Epiquinamide;(+)-Febrifugine
外文关键词:N,O-acetal; allylation; glutamic acid; Epiquinamide; (+)-Febrifugine
摘要:探索了N,O-缩醛7 C-2位的不对称烯丙基化的条件,建立了路易斯酸催化条件下高选择性烯丙基化方法(产率73%,dr 94∶6).并以此为关键反应,合成了制备(-)-Epiquinamide(1)的关键中间体21.作为延续性工作,建立了一条由(2S,3S)和(2S,3R)-9差向异构体混合物制备光学纯(+)-Febrifugine(3)的方法.从而开发了一条以廉价谷氨酸为原料制备克级常山碱的可能途径.
Lewis acid catalyzed asymmetric allylation ofN, O-acetal 7 with allyltrimethylsilane was developed for the synthe- sis of compounds 9, 10 and 16 with high disasterselectivities. A key middle compound 21 for synthesis of (--)-epiquinamide (1) was easily prepared from allylation product 16. In continuation of our work, a convenient method for synthesis of (+)-febrifugine (3) was also described from the mixture of (2S,3S) and (2S,3R)-9. Therefore, a possible approach for gram scale preparation of (+)-febrifugine (3) from glutamic acid was achieved.
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