Synthesis of Cardiotonic Steroids Oleandrigenin and Rhodexin B.
Synthesis of Cardiotonic Steroids Oleandrigenin and Rhodexin B.
复制标题
DOI:
10.1021/acs.joc.1c00985
复制
发表时间:
2021-08-06
期刊:
影响因子:
--
通讯作者:
Nagorny P
中科院分区:
文献类型:
--
作者:
Fejedelem Z;Carney N;Nagorny P
This article describes a concise synthesis of cardiotonic steroids oleandrigenin (7) and its subsequent elaboration into the natural product rhodexin B (2) from the readily available intermediate (8) that could be derived from the commercially available steroids testosterone or DHEA via three-step sequences. These studies feature an expedient installation of the β16-oxidation based on β14-hydroxyl-directed epoxidation and subsequent epoxide rearrangement. The following singlet oxygen oxidation of the C17 furan moiety provides access to oleandrigenin (7) in 12 steps (LLS) and a 3.1% overall yield from 8. The synthetic oleandrigenin (7) was successfully glycosylated with l-rhamnopyranoside-based donor 28 using a Pd(II)-catalyst, and the subsequent deprotection under acidic conditions provided cytotoxic natural product rhodexin B (2) in a 66% yield (two steps).
登录
查看更多内容
影响因子:
15
作者:
Cichowicz NR;Kaplan W;Khomutnyk Y;Bhattarai B;Sun Z;Nagorny P
通讯作者:
Nagorny P
影响因子:
21.1
作者:
Bagrov AY;Shapiro JI;Fedorova OV
通讯作者:
Fedorova OV
DOI:
10.1021/acs.joc.1c00985
发表时间:
2021-08-06
期刊:
The Journal of organic chemistry
影响因子:
--
作者:
Fejedelem Z;Carney N;Nagorny P
通讯作者:
Nagorny P
影响因子:
3.6
作者:
Crich, D;Li, HM
通讯作者:
Li, HM
影响因子:
5.4
作者:
Grosso, Filomena;Stoilov, Peter;Cochrane, Alan
通讯作者:
Cochrane, Alan