Conjugate Addition of Organozinc Compounds to Nitroolefins
作者:Norbert Sewald、Audrius Rimkus
DOI:10.1055/s-2003-44355
日期:——
excellent yield and enantioselectivity. The products can easily be transformed into beta(2)-homoamino acids, compounds of high relevance for different areas of preparative organic chemistry. 1 Introduction 2 Synthesis of Nitroolefins 3 ConjugateAddition of Organozinc Compounds 3.1 ConjugateAddition of Functionalized Organozinc Cuprates and Diorganozine Compounds 3.2 ConjugateAddition of Alkyl Trimethylsilylmethylzinc
Enantioselective Copper-Catalyzed Conjugate Addition of Dialkyl Zinc to Nitro-Olefins
作者:Alexandre Alexakis、Cyril Benhaim
DOI:10.1021/ol0059596
日期:2000.8.1
[GRAPHICS]The copper-catalyzed asymmetric conjugate addition of dialkylzinc onto various nitro-olefins has been carried out with excellent results, An enantiomeric excess of up to 94% was obtained using 0.5% Cu(OTf)(2) and 1% of chiral trivalent phosphorus ligand.
Highly Enantioselective Conjugate Addition of Dialkylzinc Reagents to Acyclic Nitroalkenes: A Catalytic Route to β<sup>2</sup>-Amino Acids, Aldehydes, and Alcohols
作者:Ate Duursma、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1021/ja029817d
日期:2003.4.1
Using chiral phosphoramidite ligand (S,R,R)-L1 in the conjugate addition to acyclic nitroalkenes for the first time, we obtained enantioselectivities up to 98%. The use of acyclic substrates with different dialkylzinc reagents provides a catalytic enantioselective route to (functionalized) β2-amino aldehydes, acids, and alcohols.