Allylation of Active Methylene Compounds with Allyl Oxime Carbonates Catalyzed by Pd(0)
作者:Osamu Suzuki、Yoshiharu Hashiguchi、Seiichi Inoue、Kikumasa Sato
DOI:10.1246/cl.1988.291
日期:1988.2.5
Allylation of active methylene compounds catalyzed by a palladium(0)-phosphine system took place highly stereoselectively by employing allyl oxime carbonates as the allylating reagent.
Regioselective Enzymatic Acylation of Aureolic Acids to Obtain Novel Analogues with Improved Antitumor Activity
作者:Javier González-Sabín、Luz Elena Núñez、Alfredo F. Braña、Carmen Méndez、José A. Salas、Vicente Gotor、Francisco Morís
DOI:10.1002/adsc.201100944
日期:2012.5.21
A variety of aureolicacids was efficiently obtained by lipase‐catalyzed regioselectiveacylation reactions of mithramycin and its analogues mithramycin SK and mithramycin SDK. The acylation took place in the aglycone moiety or in the B sugar unit, depending on the substrate, lipase and acyl donor considered. Most of the novel acylated derivatives showed antitumoractivity at double digit nanomolar