Formal total synthesis of (±)-rhazinal and its B-ring carbamate analogue
摘要:
Rhazinal and its analogues are microtubule and tubulin polymerisation disrupting agents. A formal synthesis of rhazinal is described. An interesting observation from the studies emerged about reposition of the natural product with slight modification in the structure. This opens up new possibilities for older natural products for finding better therapeutics. B-ring carbamate of rhazinal showed AChE inhibitory activity comparable to known reference standard galantamine and no cytotoxicity. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of (±)-desethylrhazinal using a tandem radical addition-cyclization process
作者:Ehecatl Paleo、Yazmin M. Osornio、Luis D. Miranda
DOI:10.1039/c0ob00572j
日期:——
The indolizidine ring system present in (±)-rhazinal, was assembled using a xanthate-based sequential intermolecular radicaladdition-cyclization process. The novel (±)-desethylrhazinal was prepared in seven steps in approximately 12% overall yield from 2-formylpyrrole, using this strategy.
Formal total synthesis of (±)-rhazinal and its B-ring carbamate analogue
作者:Munnuri Sailu、Swapnil S. Muley、Amitava Das、Prathama S. Mainkar、Srivari Chandrasekhar
DOI:10.1016/j.tet.2014.12.090
日期:2015.2
Rhazinal and its analogues are microtubule and tubulin polymerisation disrupting agents. A formal synthesis of rhazinal is described. An interesting observation from the studies emerged about reposition of the natural product with slight modification in the structure. This opens up new possibilities for older natural products for finding better therapeutics. B-ring carbamate of rhazinal showed AChE inhibitory activity comparable to known reference standard galantamine and no cytotoxicity. (C) 2014 Elsevier Ltd. All rights reserved.
Total Synthesis of (±)-Rhazinal Using Novel Palladium-Catalyzed Cyclizations
作者:Alfred L. Bowie、Dirk Trauner
DOI:10.1021/jo801791j
日期:2009.2.20
A concise synthesis of (±)-rhazinal that hinges on novel oxidative Heck cyclizations and palladium-catalyzed direct couplings is described. An X-ray structure of N-MOM-rhazinal, which provides insight into the conformation of the strained 9-membered lactam ring, is described.