Stereochimie de la des benzoates d'argent sur des diesters iododesoxy ns
作者:Claude Morpain、Jean Jacques Perie
DOI:10.1016/s0040-4020(01)96423-3
日期:1985.1
The stereochemistry of the reaction of silver benzoates on chiral di-O-aroyl-1,2 iododeoxy-3-sn-glycerols has been reinvestigated. The reaction proceeds either with or without neighbouringgroupparticipation, depending on : - possible electrophilic assistance by the silver ion to the ionisation of the substrate (occuring only with dissociated silver salts), - ability of substituants R1 and R2 on the
Asymmetric Dihydroxylations using Immobilized Alkaloids with an Anthraquinone Core
作者:Carsten Bolm、Astrid Maischak
DOI:10.1055/s-2001-9701
日期:——
In osmium-catalyzed dihydroxylations use of polymer-supported alkaloids with an anthraquinone core allows to obtain optically active diols with high enantioselectivities. Soluble as well as insoluble polymers have been tested for immobilization.
Synthesis of Optically Active Lipopeptide Analogs from the Outer Membrane of Escherichia coli.
作者:Muneaki KURIMURA、Masumi TAKEMATO、Kazuo ACHIWA
DOI:10.1248/cpb.39.2590
日期:——
The synthesis of opticallyactive lipopeptide derivatives has been accomplished by the use of chiral glycerol derivatives. Lipopeptide derivatives with (R)-glycerol moieties showed higher mitogenic activities than those with the (S)-configuration. N-2,2,2-Trichloroethoxycarbonyl lipopeptide derivatives increased mitogenic activity.
Synthesis of biologically active pentapeptide analogs of the N-terminal part of lipoprotein from the outer membrane of Escherichia coli.
作者:Muneaki KURIMURA、Masumi TAKEMOTO、Kazuo ACHIWA
DOI:10.1248/cpb.38.1110
日期:——
Newly synthesized lipopentapeptide derivatives with (R___-)-glycerol moieties showed higher mitogenic activities than those with the (S___-)-configuration.