Asymmetric total synthesis of small ring macrolide stagonolide-E has been described in this communication. The main highlight of our synthetic strategy is the application of ME-DKR (metal enzyme combo dynamic kinetic resolution) reaction, asymmetric reduction with Noyori's BINAL-H reagent system, stereoselective cross metathesis, and RCM (ring closing metathesis) reaction at a late stage enables us to achieve the synthesis of the target molecule in an efficient way. (C) 2011 Elsevier Ltd. All rights reserved.
Asymmetric total synthesis of small ring macrolide stagonolide-E has been described in this communication. The main highlight of our synthetic strategy is the application of ME-DKR (metal enzyme combo dynamic kinetic resolution) reaction, asymmetric reduction with Noyori's BINAL-H reagent system, stereoselective cross metathesis, and RCM (ring closing metathesis) reaction at a late stage enables us to achieve the synthesis of the target molecule in an efficient way. (C) 2011 Elsevier Ltd. All rights reserved.
Convergent Syntheses of 3,6-Dihydroxydec-4-enolides
作者:Jonathan C. Killen、Lorraine C. Axford、Sarah E. Newberry、Thomas J. Simpson、Christine L. Willis
DOI:10.1021/ol3018566
日期:2012.8.17
The total syntheses of the 3,6-dihydroxydecanolide from Cordyceps militaris and the novel C-3 epimer are reported using a diastereoselective Nozaki–Hiyama–Kishi reaction in the key cyclization to generate the 6R stereocenter.
Nitrogen-appended N-alkylsulfonamides as inhibitors of γ-secretase
作者:Carl P. Bergstrom、Charles P. Sloan、Henry H. Wang、Michael F. Parker、David W. Smith、Ming Zheng、Steven B. Hansel、Craig T. Polson、Lauren E. Barber、Isia Bursuker、Valerie L. Guss、Jason A. Corsa、Donna M. Barten、Kevin M. Felsenstein、Susan B. Roberts
DOI:10.1016/j.bmcl.2007.10.105
日期:2008.1
The synthesis and gamma-secretase inhibition data for a series of nitrogen-appended N-alkylsulfonamides (11-47) are described. Inhibition of brain A beta in transgenic mice was demonstrated by two of these compounds (23 and 44). (C) 2007 Elsevier Ltd. All rights reserved.