Enantiomere der 2,2'-dinitrobiphenyl-6,6'- dicarbonsäure als stereoselektiv wirksame, reversible schutzgruppen-II
作者:H.K. Müller、J. burgold
DOI:10.1016/s0040-4020(01)87373-7
日期:1986.1
-S-(-)-1.1'-Diphenyl-2,2'-dinilro-6,6'-dicarboxylic acid (1) is used as an axial-chiral protecting group for the primary hydroxy group of glycerol and glyocerol derivatives. Diesters of 1 were formed which have the largest distance between the nitro groups and the nucleophilic subtituents on glycerol After hydrogenolytical removal of the protecting group asymmetric glycerol derivatives were obtained
Halonium ion-induced biosynthesis of chlorinated marine metabolites
作者:John Geigert、Saul L. Neidleman、Susanne K. DeWitt、Demetrios J. Dalietos
DOI:10.1016/s0031-9422(00)80319-2
日期:1984.1
Abstract Bromoperoxidases do not directly oxidize the chloride ion; nevertheless, in the presence of bromide ions, chloride ions and hydrogen peroxide, bromoperoxidases react with alkenes and alkynes to produce bromochloroderivatives. This same reaction is catalysed when seawater is the source of chloride and bromide ions. This suggests that bromonium ion-induced biosynthesis of chlorinated metabolites