Organophosphine bearing multiple hydrogen-bond donors for asymmetric Michael addition reaction of 1-oxoindane-2-carboxylic acid ester via dual-reagent catalysis
phosphines derived from dipeptide dual-reagents catalyzed asymmetric Michael addition reactions between indene esters and activated olefins in high yields and good to excellent enantioselectivities under mild reaction conditions. The success of current highly selective reactions should provide inspiration for expansion to other reactions and would open up new paradigms for the synthesis of indanone derivatives
Cooperative Heterobimetallic Zinc/Alkaline Earth Metal Catalysis: A Zn/Sr Aminophenol Sulfonamide Complex for Catalytic Asymmetric Michael Addition of 3-Acetoxy-2-oxindoles to β-Ester Enones
A heterobimetallic zinc/strontium catalyst has been developed for the asymmetric Michael addition of 3-acetoxy-2-oxindoles to β-ester enones in high yields with excellent enantioselectivities and high diastereoselectivities. This process represents that 3-acetoxy-2-oxindoles can be used as a stable air- and base-tolerant precursor for chiral 3-substituted 3-hydroxy-2-oxindoles.
Diastereoselective Synthesis of 3-Hydroxyindanones via N-Heterocyclic Carbene Catalyzed [4+1] Annulation of Phthalaldehyde and 1,2-Diactivated Michael Acceptors
作者:Song Ye、Fang-Gang Sun
DOI:10.1055/s-0030-1259707
日期:2011.4
The diastereoselective synthesis of 2,2-disubstituted-3-hydroxy-indanones was realized by the N-heterocyclic carbene catalyzed [4+1] annulation of phthalaldehyde and 1,2-diactivated Michaelacceptors, which involves a tandem process of Stetter reaction, proton shift, and aldol reaction.
N-heterocyclic carbene-catalyzed cyclocondensation of 2-aryl carboxylic acids and enones: highly enantioselective synthesis of δ-lactones
作者:Jin-Tang Cheng、Xiang-Yu Chen、Song Ye
DOI:10.1039/c4ob02330g
日期:——
The enantioselective N-heterocyclic carbene-catalyzed [4 + 2] cyclocondensation of 2-arylcarboxylicacids and enones was developed, affording the corresponding chiral δ-lactones in good yields with good diastereo- and high enantioselectivities.