Journal ArticleDOI
Organocerium Additions to Chiral α,α-Dialkoxy Hydrazones: Asymmetric Synthesis of N-Protected α-Amino Acetals and α-Amino Aldehydes
TLDR
In this paper, a general and selective procedure for the diastereoselective additions of organocerium reagents to chiral α,α-dialkoxy hydrazones has been developed.Abstract:
A general and selective procedure for the diastereoselective additions of organocerium reagents to chiral α,α-dialkoxy hydrazones has been developed. The best reagent combination involved a 6:1 composition of RMet to CeCl3. Excellent yields and high selectivities were obtained after trapping as the iso-butyl carbamates. Lithiumammonia cleavage of the N-N bond followed by hydrolysis with TMSI afforded the protected α-amino aldehydes.read more
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Journal ArticleDOI
Recent developments in the stereoselective synthesis of α-aminoacids
Journal ArticleDOI
Asymmetric synthesis of amines by nucleophilic 1,2-addition of organometallic reagents to the CN-double bond
Dieter Enders,Ulrich Reinhold +1 more
Journal ArticleDOI
The SAMP-/RAMP-hydrazone methodology in asymmetric synthesis
Journal ArticleDOI
Cerium(III) Chloride Promoted Highly Regioselective Ring Opening of Epoxides and Aziridines Using NaN3 in Acetonitrile: A Facile Synthesis of 1,2-Azidoalcohols and 1,2-Azidoamines†
TL;DR: The method is very rapid and equally compatible for both epoxides and aziridines, and afforded the corresponding products in good to excellent yields under mild and neutral reaction conditions.
Journal ArticleDOI
Highly regioselective ring opening of epoxides and aziridines using cerium(III) chloride
TL;DR: A wide variety of epoxides and aziridines were converted to the corresponding β-halohydrins and β-haloamines using cerium(III) chloride and the cerium-III chloride/NaI system in acetonitrile.