Results 11 to 20 of about 16,892 (273)
Diastereoselectivity Control of the Radical Carboazidation of Substituted Methylenecyclohexanes
, 2016 A systematic study of the diastereoselectivity of the radical carboazidation of methylenecyclohexane derivatives is presented. Several substitution patterns leading to a high level of stereocontrol have been identified.
Philippe Renaud (201179) +3 more
core +4 more sources
Molecules, 2020 New developments in the synthesis, resolution, and synthetic applications of chiral 1-phenylethylamine (α-PEA) reported in the last decade have been reviewed. In particular, improvements in the synthesis of α-PEA and its derivatives and chiral resolution,
Marzena Wosińska-Hrydczuk +1 more
doaj +1 more source
Synthesis of the [11]Cyclacene Framework by Repetitive Diels–Alder Cycloadditions
Molecules, 2021 The Diels–Alder cycloaddition between bisdienes and bisdienophile incorporating the 7-oxa-bicyclo[2.2.1]heptane unit are well known to show high diastereoselectivity that can be exploited for the synthesis of molecular belts. The related bisdiene 5,6,7,8-
John B. Bauer +4 more
doaj +1 more source
Molecules, 2014 The convenient, high yielding and diastereoselective synthesis of α-amino-β-substituted-γ,γ-disubstituted butyric acid derivatives was carried out by a three-component tandem reaction of a chiral equivalent of nucleophilic glycine.
Rui Zhou +5 more
doaj +1 more source
Molecules, 2023 Under the catalysis of Rh2(OAc)4 (10 mol%) and binapbisphosphine ligand (±)-L3 (20 mol%) in DCE at 80 °C, the cascade cyclization of diazoimides with alkylidenepyrazolones underwent stereoselectively (dr > 20:1), affording pyrazole-fused oxa-bridged ...
Kuo Wang +7 more
doaj +1 more source
Reenvisioning the De Mayo Reaction: A Boron‐Enabled Cycloaddition Approach
Angewandte Chemie, EarlyView.An oxa‐boracycle conformational lock strategy enables photocatalytic [2+2] cycloaddition to afford densely substituted cyclobutylboronates. The conformational constraint suppresses triplet relaxation and promotes productive bimolecular reactivity.
Neetu Sharma +5 more
wiley +2 more sources
Beilstein Journal of Organic Chemistry, 2008 The impact of a remote aromatic nucleus on the stereochemical outcome of the conjugate addition of α-sulfonylallylic carbanions to an α,β-unsaturated ester was investigated.
Shlomo Levinger +2 more
doaj +1 more source
Angewandte Chemie, EarlyView.A catalytic network embedding a formal rearrangement enables the first catalytic enantioselective multicomponent reaction (MCR) of sulfur ylides. In the presence of a bulky chiral phosphoric acid, the reaction combines sulfoxonium ylides, aldehydes and thiols, and affords synthetically versatile β‐hydroxy‐α‐sulfanyl carbonyl compounds in ...
Nicolò Santarelli +10 more
wiley +2 more sources
Hypervalent Iodine-Mediated Diastereoselective α-Acetoxylation of Cyclic Ketones
Frontiers in Chemistry, 2020 A binary hybrid system comprising a hypervalent iodine(III) reagent and BF3•OEt2 Lewis acid was found to be effective for the diastereoselective α-acetoxylation of cyclic ketones.
Jiashen Tan +8 more
doaj +1 more source
Synthesis of Pyrrole Phosphonate Esters: Emphasis on Pyrrole NH Acids and Dialkylacetylenic Esters Substitution [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2008 Reaction of dialkyl acetylenedicarboxylates 1a-c andpyrrole derivatives 2a-e in the presence of triphenylphosphite (TPP) was investigated and the effect of the pyrrole substitution was established.
Malek Taher Maghsoodlou +3 more
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