A stereodivergent strategy to both product enantiomers from the same enantiomer of a stereoinducing catalyst: agelastatin A.
A stereodivergent strategy to both product enantiomers from the same enantiomer of a stereoinducing catalyst: agelastatin A.
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DOI:
10.1002/chem.200900794
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发表时间:
2009-07-13
影响因子:
4.3
通讯作者:
Dong, Guangbin
中科院分区:
文献类型:
--
作者:
Trost, Barry M.;Dong, Guangbin
In this article, we report a full account of our recent development of pyrroles and N-alkoxyamides as new classes of nucleophiles for palladium-catalyzed AAA reactions, along with application of these methodologies in the total synthesis of agelastatin A, a marine natural product with exceptional anti-cancer activity and other biological properties. Our method allows for access to either regioisomer of the pyrrolopiperazinones (6 and 19) with high efficiency and enantioselectivity. Note that isomer 19 was obtained via a cascade reaction through a double allylic alkylation pathway. From regioisomer 6, the total synthesis of (+)-agelastatin A was completed in a very short fashion (four steps from 6), during the course of which we developed a new copper catalyst for aziridination and an In (OTf)3-DMSO system to oxidatively open an N-tosyl aziridine. Starting with the other pyrrolopiperazinone 19, a five-step sequence has been developed to furnish a formal total synthesis of (−)-agelastatin A. A unique feature of our syntheses is the use of two rather different strategies for the total syntheses of both enantiomers of agelastatin A using the same enantiomer of a chiral palladium catalyst.
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影响因子:
1.6
作者:
Chakraborty, TK;Ghosh, A;Raju, TV
通讯作者:
Raju, TV
影响因子:
5.2
作者:
Domostoj, MM;Irving, E;Hale, KJ
通讯作者:
Hale, KJ
DOI:
10.1039/c39930001305
发表时间:
1993-08-21
影响因子:
--
作者:
DAMBROSIO, M;GUERRIERO, A;PIETRA, F
通讯作者:
PIETRA, F
影响因子:
15
作者:
Feldman, KS;Saunders, JC
通讯作者:
Saunders, JC
DOI:
10.1016/s1874-6004(05)80034-6
发表时间:
2005-01-01
期刊:
STRATEGIES AND TACTICS IN ORGANIC SYNTHESIS, VOL 6
影响因子:
--
作者:
Hale, KJ;Domostoj, MM;Mason, CK
通讯作者:
Mason, CK