40105-20-2Relevant articles and documents
On enantioselective separation of phenoxypropionates using permethylated β-cyclodextrin HPLC and GC columns
Weber,Kreuzig,Bahadir
, p. 13 - 20 (1997)
Investigations on chiral phenoxypropionates using permethylated β-cyclodextrin HPLC and GC columns showed a decrease in enantioselective separation efficiency from mecoprop-methyl and dichlorprop-methyl to the threefold chlorinated fenoprop-methyl. This corresponded to decreasing electron density in the aromatic system due to the increasing negative inductive effect of 3 chlorine substituents. Investigation on methyl-(RS)-2-(2,4-dichloro-3,6-dinitrophenoxy)-propionate confirmed the influence of electrophilic substituents while determination of ethyl-(RS)-2-methoxypropionate emphasized the necessity of an aromatic system for enantioselective separation on a-cyclodextrin stationary phases. For fenoprop-methyl as well as for the aryloxyphenoxypropionates diclofop-methyl and fluazifop-butyl, reversed phase HPLC showed higher separation performance than high resolution capillary GC.
Enantioselective cyclopropane syntheses using the chiral carbene complexes (SFe)- and (RFe)-C5H5(CO)(PR3)Fe=CHCH 3+. A mechanistic analysis of the carbene transfer reaction
Brookhart, Maurice,Liu, Yumin,Goldman, Emma W.,Timmers, Debra A.,Williams, Gregory D.
, p. 927 - 939 (2007/10/02)
Enantiomerically pure or enriched iron-carbene complexes of the type C5H5(CO)(PR3)Fe=CHCH3+ have been prepared by three routes: (a) Diastereomeric acyl complexes C5H5(CO)(PPhsub