4704-87-4Relevant academic research and scientific papers
ENANTIOMERE DER 2,2'-DINITROBIPHENYL-6,6'-DICARBONSAEURE ALS STEREOSELEKTIV WIRKSAME, REVERSIBLE SCHUTZGRUPPEN-II. STEREOSELEKTIVE SYNTHESEN VON LIPIDGRUNDKOERPERN ODER -BAUSTEINEN
Mueller, H. K.,Burgold, J.
, p. 1533 - 1538 (2007/10/02)
S-(-)-1,1'-diphenyl-2,2'-dinitro-6,6'-dicarboxylic acid (1) is used as an axial-chiral protecting group for the primary hydroxy group of glycerol and glycerol derivatives.Diesters of 1 were formed which have the largest distance between the nitro groups and the nucleophilic substituents on glycerol.After hydrogenolytical removal of the protecting group asymmetric glycerol derivatives were obtained with approximately 10percent enantiomeric excess.Hydroxybromination of 12 resulted mainly in he anti-Markovnikov 13a instead of the Markovnikov product 13b expected, which was present only in traces.This deviation is discussed.
HALONIUM ION-INDUCED BIOSYNTHESIS OF CHLORINATED MARINE METABOLITES
Geigert, John,Neidleman, Saul L.,Witt, Susanne K. de,Dalietos, Demetrios J.
, p. 287 - 290 (2007/10/02)
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 bromochloro-derivatives.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 occurs in marine environments.The role of iodonium ions in the biosynthesis of chlorinated metabolites is also discussed.Key Word Index - Coralina sp.; Rhodophyta; biological halogenation; bromoperoxidase; enzymatic bromochlorination; marine chlorination; role of bromonium ions and iodonium ions; seawater.
