Asymmetric Synthesis of Chiral 1,3-Dimethyl Units Through a Double Michael Reaction of Nitromethane and Crotonaldehyde Catalyzed by Diphenylprolinol Silyl Ether
作者:Yujiro Hayashi、Shunsuke Toda
DOI:10.1055/s-0037-1611644
日期:2019.3
efficient synthetic route to install chiral 1,3-dimethyl units through a double Michael reaction of crotonaldehyde and nitromethane catalyzed by diphenylprolinolsilylether is developed. Either 1,3-syn- or 1,3-anti-dimethyl units are obtained selectively depending on the enantiomer of the diphenylprolinolsilylether catalyst used. The side chain of pneumocandin B0 is synthesized enantioselectively by
Mutual influence of backbone proline substitution and lipophilic tail character on the biological activity of simplified analogues of caspofungin
作者:Monique P. C. Mulder、Peter Fodran、Johan Kemmink、Eefjan J. Breukink、John A. W. Kruijtzer、Adriaan J. Minnaard、Rob M. J. Liskamp
DOI:10.1039/c2ob25951f
日期:——
The echinocandins represent the most recent class of antifungal drugs. Previous structure–activityrelationship studies on these lipopeptides have relied mainly upon semisynthetic derivatives due to their complex chemical structures. A successful strategy for the rapid enantioselective synthesis of the branched fattyacid chain of caspofungin and analogues was developed to synthesize several simplified