Results 241 to 250 of about 18,744 (300)
Some of the next articles are maybe not open access.
Organic and biomolecular chemistry, 2016
An efficient base-catalysed regioselective carboannulation of allenoates (or allenylphosphonates) with dialkyl 2-(2-formylphenyl)malonates that leads to multi-substituted naphthalenes in high yields has been developed.
Nagaraju Koppanathi, K. Swamy
semanticscholar +1 more source
An efficient base-catalysed regioselective carboannulation of allenoates (or allenylphosphonates) with dialkyl 2-(2-formylphenyl)malonates that leads to multi-substituted naphthalenes in high yields has been developed.
Nagaraju Koppanathi, K. Swamy
semanticscholar +1 more source
2012
The chapter discusses the marginal notes Edmond Malone made in his copy of the second issue of the 1728 edition of Double Falsehood. Malone’s observations are placed in the context of other eighteenth-century attempts to understand the relationship between Theobald’s play and (The History of) Cardenio, especially those of Isaac Reed and George Steevens,
openaire +1 more source
The chapter discusses the marginal notes Edmond Malone made in his copy of the second issue of the 1728 edition of Double Falsehood. Malone’s observations are placed in the context of other eighteenth-century attempts to understand the relationship between Theobald’s play and (The History of) Cardenio, especially those of Isaac Reed and George Steevens,
openaire +1 more source
Organic and biomolecular chemistry, 2015
Cu(I)-catalyzed asymmetric Michael addition of cyclic ketimino esters with alkylidene malonates has been developed for efficient construction of β-branched α-amino acids containing adjacent quaternary and tertiary stereogenic centers in good yields with ...
Zhi-Yong Xue +2 more
semanticscholar +1 more source
Cu(I)-catalyzed asymmetric Michael addition of cyclic ketimino esters with alkylidene malonates has been developed for efficient construction of β-branched α-amino acids containing adjacent quaternary and tertiary stereogenic centers in good yields with ...
Zhi-Yong Xue +2 more
semanticscholar +1 more source
Organic and biomolecular chemistry, 2015
New pentaerythritol tetrabromide-based chiral quaternary ammonium salts acting as organocatalysts (7a and 7b) have been prepared and used as organocatalysts for enantioselective Michael addition reactions between various nitroolefins and Michael donors ...
V. Ashokkumar, A. Siva
semanticscholar +1 more source
New pentaerythritol tetrabromide-based chiral quaternary ammonium salts acting as organocatalysts (7a and 7b) have been prepared and used as organocatalysts for enantioselective Michael addition reactions between various nitroolefins and Michael donors ...
V. Ashokkumar, A. Siva
semanticscholar +1 more source
Journal of Organic Chemistry, 2014
A manganese-mediated dehydrogenative direct alkylation of 2-pyridones with diethyl malonates has been developed. A similar reaction system is applicable to the direct arylation with arylboronic acids.
Akihiro Nakatani +3 more
semanticscholar +1 more source
A manganese-mediated dehydrogenative direct alkylation of 2-pyridones with diethyl malonates has been developed. A similar reaction system is applicable to the direct arylation with arylboronic acids.
Akihiro Nakatani +3 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2014
trans-2-Aryl-3-nitro-cyclopropane-1,1-dicarboxylates, upon treatment with BF3·OEt2, undergo ring-opening rearrangement and the Nef reaction to give aroylmethylidene malonates.
T. Selvi, K. Srinivasan
semanticscholar +1 more source
trans-2-Aryl-3-nitro-cyclopropane-1,1-dicarboxylates, upon treatment with BF3·OEt2, undergo ring-opening rearrangement and the Nef reaction to give aroylmethylidene malonates.
T. Selvi, K. Srinivasan
semanticscholar +1 more source
Hydration and ion pairing of maleinates, malonates, and substituted malonates in aqueous solution
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1976Association constants and enthalpies of association for salts of maleic acid, malonic acid and substituted malonic acids with alkali metals and alkaline earth metals were measured colorimetrically in aqueous solution. Agreement with previous determinations by other methods was obtained.
Kläning, Ulrik K., Østerby, Ole
openaire +3 more sources
Journal of the American Chemical Society, 2014
Regiodivergent parallel kinetic resolution of aziridines with malonates was achieved under dinuclear Schiff base catalysis. The regiodivergent reaction proceeded under catalyst-control irrespective of the substituents on the aziridines, and 2.5-10 mol ...
Yingjie Xu +4 more
semanticscholar +1 more source
Regiodivergent parallel kinetic resolution of aziridines with malonates was achieved under dinuclear Schiff base catalysis. The regiodivergent reaction proceeded under catalyst-control irrespective of the substituents on the aziridines, and 2.5-10 mol ...
Yingjie Xu +4 more
semanticscholar +1 more source
A convenient allenoate-based synthesis of 2-quinolin-2-yl malonates and β-ketoesters.
Organic Letters, 2014N-Protected o-aminobenzaldehydes smoothly react with α,γ-dialkylallenoates under Brønsted basic conditions to yield 2,3-disubstituted quinolines. This three-step reaction cascade of Michael addition, aldol condensation, and 1,3-N → C rearrangement uses ...
Philipp S. Selig, W. Raven
semanticscholar +1 more source
Organic Letters, 2014
We describe herein a general method for the controlled Heck arylation of allylated malonates. Both electron-rich and electron-poor aryldiazonium salts were readily employed as the aryl-transfer agents in good yields and in high chemo-, regio-, and ...
Caio C. Oliveira +8 more
semanticscholar +1 more source
We describe herein a general method for the controlled Heck arylation of allylated malonates. Both electron-rich and electron-poor aryldiazonium salts were readily employed as the aryl-transfer agents in good yields and in high chemo-, regio-, and ...
Caio C. Oliveira +8 more
semanticscholar +1 more source