Total synthesis of lepadiformine alkaloids using N-Boc α-amino nitriles as trianion synthons.

Total synthesis of lepadiformine alkaloids using N-Boc α-amino nitriles as trianion synthons.
复制标题

DOI:
10.1021/jo300161x
复制
发表时间:
2012-04-06
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Rychnovsky SD
Rychnovsky SD
中科院分区:
其他
文献类型:
--
作者:
Perry MA;Morin MD;Slafer BW;Rychnovsky SD

文献摘要

参考文献

被引文献

相似文献

采用还原环化法合成了对映体纯的Lepadiformine A、B和C。N-叔丁氧羰基α-氨基腈经去质子化和对映体纯的二溴化物烷基化得到第一个环。产物被操作以引入磷酸酯离去基团,随后的还原锂化,随后的分子内烷基化形成具有高立体选择性的第二环。第三环通过脱保护的胺对甲磺酸酯进行分子内置换而形成。Lepadiformine A和B含有与胺相邻的羟甲基。该附加物以使用Polonovski-Potier反应作为关键步骤的顺序引入。该合成策略具有立体选择性和收敛性,并证明了N-Boc α-氨基腈作为生物碱合成关键的实用性。
Lepadiformine A, B and C were synthesized in enantiomerically pure form using a reductive cyclization strategy. N-Boc α-amino nitriles were deprotonated and alkylated with enantiomerically pure dibromides to afford the first ring. The products were manipulated to introduce phosphate leaving-groups, and subsequent reductive lithiation followed by intramolecular alkylation formed the second ring with high stereoselectivity. The third ring was formed by intramolecular displacement of a mesylate by the deprotected amine. Lepadiformine A and B contain a hydroxymethyl group adjacent to the amine. This appendage was introduced in a sequence using a Polonovski-Potier reaction as the key step. The synthetic strategy is stereoselective and convergent, and demonstrates the utility of N-Boc α-amino nitriles as linchpins for alkaloid synthesis.
DOI: 10.1002/ejoc.20040404
发表时间: 2004-11-26
影响因子: 2.8
作者:
François, D;Poupon, E;Husson, HP
通讯作者: Husson, HP
DOI: 10.1002/anie.200604670
发表时间: 2007-01-01
影响因子: 16.6
作者:
Caldwell, John J.;Craig, Donald
通讯作者: Craig, Donald
DOI: 10.1021/ol801523r
发表时间: 2008-09-18
期刊: Organic letters
影响因子: 5.2
作者:
Bahde RJ;Rychnovsky SD
通讯作者: Rychnovsky SD
DOI: 10.1021/jo01298a034
发表时间: 1980-01-01
影响因子: 3.6
作者:
FREEMAN, PK;HUTCHINSON, LL
通讯作者: HUTCHINSON, LL
DOI: 10.1002/anie.197508011
发表时间: 1975-01-01
期刊: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH
影响因子: --
作者:
APPEL, R
通讯作者: APPEL, R