Results 41 to 50 of about 10,179 (225)
Frontiers in Chemistry, 2022 Conventional quinazoline synthesis methods involve a highly multistep reaction, and often require excess amounts of substrate to control the product selectivity, leading to significant resource wastage.
Yuki Yamamoto +7 more
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Amino Amide Organocatalysts for Asymmetric Michael Addition of β-Keto Esters with β-Nitroolefins [PDF]
, 2019 Asymmetric Michael addition of β-keto esters with trans-β-nitroolefins using chiral amino amide organocatalyst was tried and afforded synthetically useful chiral Michael adducts in both excellent chemical yields (up to 99%) and stereoselectivities (up to
CHENNAPURAM Madhu +8 more
core +2 more sources
Mechanochemical synthesis of poly(trimethylene carbonate)s: an example of rate acceleration
Beilstein Journal of Organic Chemistry, 2019 Mechanochemical polymerization is a rapidly growing area and a number of polymeric materials can now be obtained through green mechanochemical synthesis.
Sora Park, Jeung Gon Kim
doaj +1 more source
Chemistry, 2023 The preparation of a new class of six bifunctional thiourea organocatalysts having a D-fructose scaffold and a primary amino group was demonstrated.
Samson Lalhmangaihzuala +9 more
doaj +1 more source
A Squaramide-Based Organocatalyst as a Novel Versatile Chiral Solvating Agent for Carboxylic Acids
MoleculesA squaramide-based organocatalyst for asymmetric Michael reactions has been tested as a chiral solvating agent (CSA) for 26 carboxylic acids and camphorsulfonic acid, encompassing amino acid derivatives, mandelic acid, as well as some of its analogs ...
Fabio Spiaggia +5 more
doaj +1 more source
Thioether-catalysed tandem synthesis of furans and cyclic ethers or lactones [PDF]
, 2017 Acyclic conjugated ynenediones tethered to an alcohol or carboxylic acid are converted into furanyl-substituted cyclic ethers or lactones in a single step by treatment with the tetrahydrothiophene.
Clark, J. Stephen, Klaus, Verena
core +1 more source
A heteroditopic macrocycle as organocatalytic nanoreactor for pyrroloacridinone synthesis in water
Beilstein Journal of Organic Chemistry, 2019 A heteroditopic macrocycle is reported as an efficient organocatalytic nanoreactor for the synthesis of diversely functionalized pyrroloacridinones in aqueous medium.
Piyali Sarkar +2 more
doaj +1 more source
Enantioselective addition of aryl ketones and acetone to nitroalkenes organocatalyzed by carbamate-monoprotected cyclohexa-1,2-diamines [PDF]
, 2015 Enantiomerically pure carbamate-monoprotected trans-cyclohexane-1,2-diamines are used as chiral organocatalysts for the addition of aryl ketones and acetone to nitroalkenes to give enantioenriched β-substituted γ-nitroketones.
Chinchilla, Rafael +4 more
core +2 more sources
ChemistryOpenIn this study, we describe the synthesis of cinchona (thio)squaramide and a novel cinchona thiourea organocatalyst. These catalysts were employed in pharmaceutically relevant catalytic asymmetric reactions, such as Michael, Friedel–Crafts, and A3 ...
Dr. Sándor Nagy +8 more
doaj +1 more source
2-Aminobenzimidazole Organocatalyzed Asymmetric Amination of Cyclic 1,3-Dicarbonyl Compounds [PDF]
, 2015 The use of a trans-cyclohexanediamine benzimidazole derivative as a hydrogen-bond catalyst for the electrophilic amination of cyclic 1,3-dicarbonyl compounds is herein presented. High yields and enantioselectivities varying from moderate to excellent are
Alonso, Diego A. +3 more
core +2 more sources