Calmodulin inhibitory activity of the malbrancheamides and various analogs
作者:Kenneth A. Miller、Mario Figueroa、Meriah W.N. Valente、Thomas J. Greshock、Rachel Mata、Robert M. Williams
DOI:10.1016/j.bmcl.2008.10.057
日期:2008.12
The preparation and biological activity of various structural analogs of the malbrancheamides are disclosed. The impact of indole chlorination, C-12a relative stereochemistry, and bicyclo[2.2.2]diazaoctane core oxidation state on the ability of these analogs to inhibit calmodulin dependent phosphodiesterase (PDE1) was studied, and a number of potent compounds were identified.[GRAPHICS](C) 2008 Elsevier Ltd. All rights reserved.
Improved Biomimetic Total Synthesis of <scp>d</scp>,<scp>l</scp><i>-</i>Stephacidin A
作者:Thomas J. Greshock、Robert M. Williams
DOI:10.1021/ol701845t
日期:2007.10.1
The direct conversion of beta-hydroxyproline derivatives into 5-hydroxypyrazin-2(1H)-ones under Mitsunobu conditions has been discovered to be a general biomimetic protocol generating IMDA intermediates and has been applied to the concise, biomimetic total syntheses of D,L-stephacidin A and D,L-brevianamide B.