Conjugate Addition of Mixed Diorganozinc Compounds and Functionalized Organozinc Cuprates to Nitroolefins
作者:Audrius Rimkus、Norbert Sewald
DOI:10.1021/ol026557w
日期:2002.9.1
conjugate addition of symmetrical and mixed diorganozinc compounds as well as functionalized diorganozinc cuprates to nitroolefins leads to synthetically versatile nitro compounds in moderate to good yields. Mixed TMSM-organozinc compounds are suitable reagents for conjugate addition, since the TMSM group is not being transferred. Ipso substitution is observed in the absence of a catalytic amount of
Preparation of polyfunctional nitro olefins and nitroalkanes using the copper-zinc reagents RCu(CN)ZnI
作者:Carole Jubert、Paul Knochel
DOI:10.1021/jo00046a027
日期:1992.9
The addition of the copper-zinc reagents RCu(CN)ZnX to a variety of nitro olefins produces polyfunctional nitroalkanes in high yields. The intermediate zinc or copper nitronates can be directly submitted to a Nef reaction (O3,-78-degrees-C) and converted to polyfunctional ketones in a one-pot procedure. The addition of RCu(CN)ZnX to nitro olefins bearing a leaving group (RSO2, RS) in the beta-position provides pure (E)-nitro olefins in excellent yields. The reaction has been applied for the stereoselective preparation of 1,3-nitrodienes and for a Diels-Alder reaction precursor.
The addition of the highly functionalized zinc-copper reagents RCu(CN)ZnI to nitro olefins
作者:Carole Retherford、Ming Chang P. Yeh、Ioana Schipor、Huai Gu Chen、Paul Knochel
DOI:10.1021/jo00283a005
日期:1989.10
RETHERFORD, CAROLE;YEH, MING CHANG P.;SCHIPOR, IOANA;CHEN, HUAI GU;KNOCHE+, J. ORG. CHEM., 54,(1989) N2, C. 5200-5202
作者:RETHERFORD, CAROLE、YEH, MING CHANG P.、SCHIPOR, IOANA、CHEN, HUAI GU、KNOCHE+
DOI:——
日期:——
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