Results 41 to 50 of about 16,892 (273)
SynOpen, 2019 A very efficient synthetic route to (–)-bulgecinine and 5-epibulgecinine from an aldehyde derived from l-glutamic acid is reported. Proline-catalysed asymmetric α-hydroxylation reaction of an aldehyde is the key step in this synthesis, which is used to ...
Vipin Kumar Jain, Mrityunjay Kumar
doaj +1 more source
, 2016 Magnetic isotope effects (MIE) on the diastereoselectivity of the triplet [2+2]-photocycloaddition of benzaldehyde with 2,3-dihydrofuran are described for four substrate combinations.
Samir Bondock (806706) +2 more
core +2 more sources
Recent Advances in π-Stacking Interaction-Controlled Asymmetric Synthesis
MoleculesThe π-stacking interaction is one of the most important intramolecular and intermolecular noncovalent interactions in organic chemistry. It plays an important role in stabilizing some structures and transition states in certain reactions via both ...
Jiaxi Xu
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Recent developments in the asymmetric Reformatsky-type reaction
Beilstein Journal of Organic Chemistry, 2018 This review collects the most important developments in asymmetric Reformatsky-type reactions published since the beginning of 2013, including both diastereoselective methodologies based on the use of chiral substrates and enantioselective catalytic ...
Hélène Pellissier
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Passerini Reactions on Biocatalytically Derived Chiral Azetidines
Molecules, 2016 The purpose of this study was to explore a series of Passerini reactions on a biocatalytically derived enantiopure azetidine-2-carboxyaldehyde in order to obtain, in a diastereoselective manner, polyfunctionalised derivatives having the potential to be ...
Lisa Moni +6 more
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Decoration of A-Ring of a Lupane-Type Triterpenoid with Different Oxygen and Nitrogen Heterocycles
Molecules, 2022 Betulinic acid (BA) was used as starting building block to create a library of novel BA-derived compounds containing O- and N-heterocycles. Firstly, BA was converted into methyl betulonate (BoOMe), which was used as intermediate in the developed ...
Joana L. C. Sousa +3 more
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, 2010 One-pot reactions of FeCl(2).4H(2)O and 2,2'-bipyridine-6-carbaldehyde with enantiopure chiral amines lead to octahedral [FeL(2)](2+) complexes, the diastereoselectivity of which depends on the nature of the amine; an interplay of intra-cation pi ...
Constable, E. C. +4 more
core +1 more source
Diastereoselectivity in the alkylations of bicyclic piperidinones
, 1998 The synthesis of substituted [4.3.0] bicyclic lactams derived from 6- oxo-2-hydroxymethylpiperidine is described. The enolate derived flora these systems can be alkylated with a range of reactive electrophiles; the diastereoselectivity which can be ...
Woods, GA +5 more
core +1 more source
Unexplored Nucleophilic Ring Opening of Aziridines
Molecules, 2010 The reactivity of dianions of carboxylic acids towards aziridines has been studied. Although, a similar reactivity to that of enolates from ketones, esters or amides has been observed, the method directly yields g-aminoacids in one step.
Ana María Costero +3 more
doaj
Catalytic Diastereoselective Petasis Reactions [PDF]
Angewandte Chemie, 2011 Multicomponent Petasis reactions: the first diastereoselective Petasis reaction catalyzed by chiral biphenols that enables the synthesis of syn and anti β-amino alcohols in pure form has been developed. The reaction exploits a multicomponent approach that involves boronates, α-hydroxy aldehydes, and amines.
Giovanni, Muncipinto +3 more
openaire +2 more sources