et al.Selective conjugate addition of nitromethane to enoates derived from D-mannitol and L-tartaric. Tetrahedron Asymmetry . 2002Pinto, A.C. et al., " Selective conjugate addition of nitromethane to enoates derived from D-mannitol and L-tartaric acid, " Tetrahedron: Asymmetry, vol. 13, pp...
Hajra, SaumenAziz, Sk MohammadMaji, RajatRsc AdvancesHajra, S.; Aziz, S.M.; Maji, R. Organocatalytic enantioselective conjugate addition of nitromethane to alkylidenemalonates: Asymmetric synthesis of pyrrolidine-3-carboxylic acid derivatives. RSC Adv. 2013, 3, 10185-10188. [CrossRef]...
Selective conjugate addition of nitromethane to enoates derived from D-mannitol and L-tartaric acid The conjugate addition of nitromethane to enoates prepared from D-(+)-mannitol, substituted at the alpha-position by a methyl or a benzyl group, was invest... P Ac.,F Cbl.,D Ag.,... -...
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rico C. Pinto, et al..Selective conjugate addition of nitromethane to enoates derived from D-mannitol and L-tartaric acid.《Tetrahedron: Asymmetry》.2002,第13卷第1025–1031页.Americo C,Cleide B,Freitas L. et al.Selective conjugate addition of nitromethane to enoates derived from D-mannitol ...
The resulting amino ester was transformed to the bicyclic amino acid, a promising building block for the synthesis of 1,3-heterocycles and peptidomimetics. The conjugate addition of nitromethane to α,β-unsaturated methyl ester likewise resulted in nitro esters in stereospecific reactions. Catalytic ...
Four reactions, delivering advanced intermediates en route to the target amino acid, were selected for a thorough optimisation. Three of this reactions involved iminium ion catalysis with a prolinol catalyst (addition of nitromethane, nitroacetate and acetamidomalonate) and one was based on a Cinchona...
conjugate additionorganocatalysisγ-amino acidnitroestersA single C2-symmetric squaramide catalyst system allows the facile addition of either malononitrile or benzyl nitroacetate to simple pyrazole-based Michael acceptors with excellent enan-tiocontrol and at lower catalyst loadings than previously possible....
A new and efficient conjugate addition of trialkylphosphites to 3-ω-bromoacetylcoumarin 1 catalysed by -toluenesulfonic acid (TsOH) has been studied. Under the same conditions, an enolphosphate gave the corresponding esters of 3-acetyl-4-phosphono-2-oxochromans in high yields. The use of ...
Michael addition of dibenzylamine to (−)- and (+)- tert-butyl myrtenate, (−)- 2 and (+)- 2, derived from (−)- and (+)-myrtenal, furnished monoterpene-based β-amino acid derivatives in highly stereospecific reactions. The resultant amino esters (−)- 3 and (+)- 3 were ...