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Asymmetric [3+n]‐Cycloaddition Reactions of Donor‐Acceptor Cyclopropanes
ChemCatChem, 2023[3+n]‐Cycloaddition reactions that employ donor‐acceptor cyclopropanes using either chiral catalysts and racemic cyclopropanes or achiral catalysts and chiral, non‐racemic, cyclopropanes have become useful transformations for the construction of ...
Ming Bao, Michael P. Doyle
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Synlett : Accounts and Rapid Communications in Synthetic Organic Chemistry, 2022
As a special class of cyclopropanes, gem-difluorinated cyclopropanes have many fascinating properties due to the gem-difluoro substitution, and thus their reactions have received much attention from the synthetic community.
Yulei Zhu +3 more
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As a special class of cyclopropanes, gem-difluorinated cyclopropanes have many fascinating properties due to the gem-difluoro substitution, and thus their reactions have received much attention from the synthetic community.
Yulei Zhu +3 more
semanticscholar +1 more source
Angewandte Chemie, 2021
Herein, we report a rhodium catalyzed directing-group free regioselective C-H allylation of simple arenes. Readily available gem -difluorinated cyclopropanes can be employed as highly reactive allyl surrogates via a sequence of C-C and C-F bond ...
Zhong-Tao Jiang +4 more
semanticscholar +1 more source
Herein, we report a rhodium catalyzed directing-group free regioselective C-H allylation of simple arenes. Readily available gem -difluorinated cyclopropanes can be employed as highly reactive allyl surrogates via a sequence of C-C and C-F bond ...
Zhong-Tao Jiang +4 more
semanticscholar +1 more source
The Journal of Organic Chemistry, 2021
A new ionic cyclopropanation process involving the addition of diazo esters to donor-acceptor cyclopropanes (DAC) activated by GaCl3 has been developed. The reactions occur via 1,2-zwitterionic gallium complexes with elimination of nitrogen in all cases to give 1,1,2,3-tetrasubstituted cyclopropanes as the main products.
Irina A. Borisova +5 more
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A new ionic cyclopropanation process involving the addition of diazo esters to donor-acceptor cyclopropanes (DAC) activated by GaCl3 has been developed. The reactions occur via 1,2-zwitterionic gallium complexes with elimination of nitrogen in all cases to give 1,1,2,3-tetrasubstituted cyclopropanes as the main products.
Irina A. Borisova +5 more
openaire +2 more sources
Asymmetric Catalytic Reactions of Donor-Acceptor Cyclopropanes.
Angewandte Chemie, 2020Due to the synergistic "push-pull" effect of vicinal electron-donating and electron-withdrawing groups, donor-acceptor (D-A) cyclopropanes have been recognized as one of the most powerful reagents to generate polyfunctional reactive intermediates after a
Yong Xia, Xiao-Hua Liu, Xiao-Ming Feng
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Creating Stereocenters within Acyclic Systems by C-C Bond Cleavage of Cyclopropanes.
Chemical Reviews, 2020Recent developments in the stereoselective synthesis of polysubstituted cyclopropanes nowadays allow chemists to easily access these strained rings with high diastereo- and enantiomeric ratios.
Y. Cohen, Anthony Cohen, I. Marek
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Energy & Fuels, 2010
The cyclopropanated derivatives of three diesel-compatible biofuels—limonene, turpentine, and canola oil methyl ester—were prepared. Their heats of combustion were both calculated using theoretical methods and measured experimentally, and it was found that for all three compounds the specific energy (in kJ/g) was similar to that of the starting ...
Alexandre Langlois, Olivier Lebel
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The cyclopropanated derivatives of three diesel-compatible biofuels—limonene, turpentine, and canola oil methyl ester—were prepared. Their heats of combustion were both calculated using theoretical methods and measured experimentally, and it was found that for all three compounds the specific energy (in kJ/g) was similar to that of the starting ...
Alexandre Langlois, Olivier Lebel
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ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
E. E. Schultz +6 more
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AbstractFor Abstract see ChemInform Abstract in Full Text.
E. E. Schultz +6 more
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Chemical Reviews, 2018
In addition to the appealing synthetic transformations that cyclopropanes present, they are also part of larger molecular structures that possess a wide range of biological properties. Therefore, the preparation of enantiomerically enriched cyclopropanes
Longyang Dian, I. Marek
semanticscholar +1 more source
In addition to the appealing synthetic transformations that cyclopropanes present, they are also part of larger molecular structures that possess a wide range of biological properties. Therefore, the preparation of enantiomerically enriched cyclopropanes
Longyang Dian, I. Marek
semanticscholar +1 more source
The Protonation of Gaseous Cyclopropane
Chemistry - A European Journal, 2001The protonation of cyclopropane by gaseous Brønsted acids of varying strength in radiolytic experiments at atmospheric pressure leads to two distinct C3H7- isomers that have been sampled by their reaction with benzene. The neutral end products, nC3H7-C6H5 and iC3H7-C6H5, arise from the electrophilic aromatic substitution reaction with the cC3H7+ and ...
CHIAVARINO, Barbara +3 more
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