Chigusa Seki
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View article: 2-Azanorbornane-Based Amino Amide Organocatalysts for Asymmetric Michael Addition of <i>β</i>-Keto Esters with Nitroolefins
2-Azanorbornane-Based Amino Amide Organocatalysts for Asymmetric Michael Addition of <i>β</i>-Keto Esters with Nitroolefins Open
Newly designed optically active cage type 2-azanorbornane-based amino amide organocatalysts were developed and employed in the asymmetric Michael addition of β-keto esters with nitroolefins to afford the chiral Michael adducts with good ch…
View article: Characterization of Ralstonia Insidiosa C1 Isolated from Alpine Regions: Capability in Pha Degradation and Production
Characterization of Ralstonia Insidiosa C1 Isolated from Alpine Regions: Capability in Pha Degradation and Production Open
View article: CCDC 2179025: Experimental Crystal Structure Determination
CCDC 2179025: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Thiourea fused γ-amino alcohol organocatalysts for asymmetric Mannich reaction of β-keto active methylene compounds with imines
Thiourea fused γ-amino alcohol organocatalysts for asymmetric Mannich reaction of β-keto active methylene compounds with imines Open
Catalytic functionality of new optically active thiourea fused γ-amino alcohols was examined in the asymmetric Mannich reaction of β-keto active methylene compounds with imines to afford chiral Mannich products, β-amino keto compounds..
View article: New boro amino amide organocatalysts for asymmetric cross aldol reaction of ketones with carbonyl compounds
New boro amino amide organocatalysts for asymmetric cross aldol reaction of ketones with carbonyl compounds Open
Distinct types of new boron fused primary amino amide organocatalysts were designed and synthesized from commercially available amino acids.
View article: Catalytic Efficiency of Primary α-Amino Amides as Multifunctional Organocatalysts in Recent Asymmetric Organic Transformations
Catalytic Efficiency of Primary α-Amino Amides as Multifunctional Organocatalysts in Recent Asymmetric Organic Transformations Open
Chiral primary α-amino amides, consisting of an adjacent enamine bonding site (Bronsted base site), a hydrogen bonding site (Bronsted acid site), and flexible bulky substituent groups to modify the steric factor, are proving to be extremel…
View article: Chemical analysis of amyloid β aggregation inhibitors derived from Geranium thunbergii
Chemical analysis of amyloid β aggregation inhibitors derived from Geranium thunbergii Open
View article: New Sugar Based γ-Amino Silyl Ether Organocatalysts for Asymmetric Michael Addition of β-Keto Esters with Nitroolefins
New Sugar Based γ-Amino Silyl Ether Organocatalysts for Asymmetric Michael Addition of β-Keto Esters with Nitroolefins Open
View article: CCDC 1823802: Experimental Crystal Structure Determination
CCDC 1823802: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: New small γ-turn type <i>N</i>-primary amino terminal tripeptide organocatalyst for solvent-free asymmetric aldol reaction of various ketones with aldehydes
New small γ-turn type <i>N</i>-primary amino terminal tripeptide organocatalyst for solvent-free asymmetric aldol reaction of various ketones with aldehydes Open
New small γ-turn type N -primary amino terminal tripeptides were applied for the asymmetric aldol reaction of ketones with aldehydes under neat conditions to afford the chiral aldol products (up to 99%, up to syn : anti/ 13 : 87 dr, up to …
View article: Simple primary β-amino alcohols as organocatalysts for the asymmetric Michael addition of β-keto esters to nitroalkenes
Simple primary β-amino alcohols as organocatalysts for the asymmetric Michael addition of β-keto esters to nitroalkenes Open
Simple primary β-amino alcohols X act as an efficient organocatalysts in the asymmetric Michael addition of β-keto esters A with nitroalkenes B affording highly pure chiral Michael adducts C.
View article: Simple organocatalyst component system for asymmetric hetero Diels–Alder reaction of isatins with enones
Simple organocatalyst component system for asymmetric hetero Diels–Alder reaction of isatins with enones Open
A simple two catalysts component system of β-amino alcohols (catalyst) and amino acids (co-catalyst) works as an efficient organocatalysts in hetero Diels–Alder reaction of isatins with enones to afford chiral spirooxindole-tetrahydropyran…
View article: Sugar Based γ-Amino Alcohol Organocatalyst for Asymmetric Michael Addition of β-Keto Esters with Nitroolefins
Sugar Based γ-Amino Alcohol Organocatalyst for Asymmetric Michael Addition of β-Keto Esters with Nitroolefins Open
H and 13 C NMR copies of compound 7b-n ………………………...2-14 2. 1 H NMR copies of catalysts 4a-j…………………………………….15-203. 13 C and DEPT NMR of catalyst 4j…………………………………...21 1 H NMR Ethyl-1-(2-nitro-1-phenylethyl)-2-oxocyclopentanecarboxylate 7b 13…
View article: New Hybrid-type Squaramide-Fused Amino Alcohol Organocatalyst for Enantioselective Domino Michael Addition/Cyclization Reaction of Oxoindolines with Cyclic 1,3-Diketones
New Hybrid-type Squaramide-Fused Amino Alcohol Organocatalyst for Enantioselective Domino Michael Addition/Cyclization Reaction of Oxoindolines with Cyclic 1,3-Diketones Open
The new hybrid-type squaramide-fused amino alcohol containing both a Brønsted basic site and hydrogen-bonding sites in the molecule showed a high catalytic activity as an organocatalyst in the enantioselective domino Michael addition/cycli…
View article: β-Amino Alcohol Organocatalysts for Asymmetric Additions
β-Amino Alcohol Organocatalysts for Asymmetric Additions Open
View article: Structure–activity relations of rosmarinic acid derivatives for the amyloid β aggregation inhibition and antioxidant properties
Structure–activity relations of rosmarinic acid derivatives for the amyloid β aggregation inhibition and antioxidant properties Open
View article: CCDC 1552298: Experimental Crystal Structure Determination
CCDC 1552298: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Development of Asymmetric Cycloaddition Reaction Using Amino Alcohol and its Derivative as an Organocatalyst
Development of Asymmetric Cycloaddition Reaction Using Amino Alcohol and its Derivative as an Organocatalyst Open
View article: CCDC 1443258: Experimental Crystal Structure Determination
CCDC 1443258: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Chiral primary amino alcohol organobase catalysts for the asymmetric Diels–Alder reactions of anthrones with maleimides
Chiral primary amino alcohol organobase catalysts for the asymmetric Diels–Alder reactions of anthrones with maleimides Open
View article: Lipase-catalyzed domino Michael–aldol reaction of 2-methyl-1,3-cycloalkanedione and methyl vinyl ketone for the synthesis of bicyclic compounds
Lipase-catalyzed domino Michael–aldol reaction of 2-methyl-1,3-cycloalkanedione and methyl vinyl ketone for the synthesis of bicyclic compounds Open
Synthesis of bicyclic compounds was achieved via a lipase-catalysed, stereoselective, domino Michael-aldol reaction of 2-methyl-1,3-cycloalkanedione and methyl vinyl ketone. Appropriate reaction conditions, including the type of enzyme, so…
View article: Poly-3-hydroxybutyrate (PHB) production from alkylphenols, mono and poly-aromatic hydrocarbons using Bacillus sp. CYR1: A new strategy for wealth from waste
Poly-3-hydroxybutyrate (PHB) production from alkylphenols, mono and poly-aromatic hydrocarbons using Bacillus sp. CYR1: A new strategy for wealth from waste Open
View article: CCDC 993006: Experimental Crystal Structure Determination
CCDC 993006: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 993007: Experimental Crystal Structure Determination
CCDC 993007: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …