Total syntheses of the monoterpene indole alkaloids (±)-alstilobanine A and E and (±)-angustilodine.
Total syntheses of the monoterpene indole alkaloids (±)-alstilobanine A and E and (±)-angustilodine.
复制标题
DOI:
10.1021/jo402495q
复制
发表时间:
2014-01-03
期刊:
影响因子:
--
通讯作者:
Weinreb SM
中科院分区:
文献类型:
--
作者:
Feng Y;Majireck MM;Weinreb SM
A synthetic strategy has been developed culminating in stereoselective total syntheses of the small class of unusual monoterpenoid indole alkaloids exemplified by alstilobanine A (3) and E (2) and angustilodine (1). A pivotal step includes a novel intermolecular Michael-type addition of an indole ester dianion to a piperidine-derived nitrosoalkene to form the C15, C16 bond of the alkaloids. In addition, an application of the Romo protocol for effecting a stereoselective intramolecular nucleophile-assisted aldol-lactonization was employed, leading to a β-lactone incorporating the requisite cis-fused 2-azadecalin moiety and also setting the C15, C19, C20 relative stereochemistry of the metabolites. It was then possible to stereoselectively effect an aldolization of a dianion derived from this indole ester β-lactone intermediate with formaldehyde to introduce the requisite C16 hydroxymethyl group. Further manipulations of the system ultimately led to the three alkaloids in racemic form.
登录
查看更多内容
DOI:
10.1039/a904402g
发表时间:
1999-10-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2
影响因子:
--
作者:
Bassindale, AR;Borbaruah, M;Taylor, PG
通讯作者:
Taylor, PG
影响因子:
15
作者:
DENMARK, SE;DAPPEN, MS;JACOBS, RT
通讯作者:
JACOBS, RT
影响因子:
5.2
作者:
Henry-Riyad, Huda;Lee, Changsuk;Romo, Daniel
通讯作者:
Romo, Daniel
影响因子:
2.7
作者:
Huscroft, IT;Carlson, EJ;Kulagowski, JJ
通讯作者:
Kulagowski, JJ
影响因子:
0.6
作者:
Chauhan, Pradeep S.;Majireck, Max M.;Weinreb, Steven M.
通讯作者:
Weinreb, Steven M.