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Asymmetric synthesis | Chemvoice
- substituted derivatives were synthesized by either direct alkylation orreductive alkylation of (1)-, (1,2)-,and (1,2)-ephedrine (Scheme 2). Thesederivatives were then employed in the asymmetric addition reaction withdiethylzinc and aldehydes and .
Synthesis and characterization of mesoporous material MCM-41 and SBA-15 and used them as a support for heterogenization of chiral Mn(III) salen complexes.
Asymmetric synthesis - SlideShare
Burke andcoworkers had published an article in that inspired our group to explore the use of derivatives as templates formaking phosphine ligands. Thus, (1,2)- and (1,2)-were reacted with two equivalents of -()benzoic acid, two equivalents of1-ethyl-3-dimethylaminopropyl , and acatalytic amount of DMAP to afford a series of phosphine ligands (Scheme 4). We learned that these easily prepared derivatives could indeed serveas effective ligands in the palladium catalyzed asymmetric allylic alkylationof dimethyl malonate and afforded product enantioselectivities up to 89% . Our currentefforts are now directed towards using the alkaloids and other chiral, non-racemic beta-amino alcohols.
Pracejuss Chiral Ester Synthesis
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