You searched for:
Subject term
acylation
Remove constraint Subject term: acylation
Subject term
epoxides
Remove constraint Subject term: epoxides
PubAg
Main content area
Limit your search
Search
9 Search Results
1 - 9 of 9
Search Results
- Author:
- Yunlong Yang; Yuanlong Guo; Jili Yuan; Haibo Xie; Chengtao Gao; Tianxiang Zhao; Qiang Zheng
- Source:
- ACS sustainable chemistry & engineering 2022 v.10 no.24 pp. 7990-8001
- ISSN:
- 2168-0485
- Subject:
- acylation; adsorption; carbon dioxide; carboxylic acids; catalytic activity; composite polymers; density functional theory; energy; epoxides; green chemistry; maleic anhydrides; moieties; porous media; styrene; surface area
- Abstract:
- ... The design and facile preparation of ionic liquids (ILs)-functionalized polymer materials is a hot research topic due to their potential wide applications. Herein, taking the reaction advantage of a cyclic anhydride with an alcoholic compound to atom-economically generate a carboxyl ester pending a carboxylic acid moiety, porous organic framework (POF) materials pending carboxylic acids and imidaz ...
- DOI:
- 10.1021/acssuschemeng.2c01660
- https://doi.org/10.1021/acssuschemeng.2c01660
- Author:
- Carmen Nájera; Francisco Foubelo; José M. Sansano; Miguel Yus
- Source:
- Tetrahedron 2022 v.106-107 pp. 132629
- ISSN:
- 0040-4020
- Subject:
- acylation; alkylation; amides; anhydrides; aziridines; catalytic activity; cyclohexanes; cyclohexenes; dicarboxylic acids; enantioselectivity; epoxides; hydrolysis; lactones; nitrogen; oxidation; oxygen; polyols; silanes
- Abstract:
- ... This review covers the recent developments (since 2015) of enantioselective desymmetrization reactions using metal-catalyzed, organocatalyzed and enzymatic processes of prochiral and meso-compounds. This asymmetric strategy has been applied to a great number of organic compounds such as diarylalkanes, silanes, alcohols, amines and dibenzylmethylamines, as well as unsaturated compounds comprising d ...
- DOI:
- 10.1016/j.tet.2022.132629
- https://doi.org/10.1016/j.tet.2022.132629
- Author:
- Juan Tamayo-Cabezas; Salwa Karboune
- Source:
- Process biochemistry 2019 v.79 pp. 81-90
- ISSN:
- 1359-5113
- Subject:
- Humicola insolens; acylation; catalytic activity; emulsions; epoxides; ferulic acid; feruloyl esterase; magnetism; microparticles; nanoparticles; raffinose; substrate specificity
- Abstract:
- ... Ferulic acid acylation of oligosaccharides catalyzed by feruloyl esterases (FAE) is a promising route to produce feruloylated oligosaccharides. However, modulation of FAE synthetic properties is a key step to improve the acylation. The efficiency of H. insolens FAE to catalyze the feruloylation in six different surfactantless microemulsions reaction systems was evaluated. The highest yield (57%) w ...
- DOI:
- 10.1016/j.procbio.2018.12.013
- https://doi.org/10.1016/j.procbio.2018.12.013
- Author:
- Clément Audubert; Alexanne Bouchard; Gary Mathieu; Hélène Lebel
- Source:
- Journal of organic chemistry 2018 v.83 no.22 pp. 14203-14209
- ISSN:
- 1520-6904
- Subject:
- acylation; amination; amines; ammonia; ammonium hydroxide; ammonium salts; chemical structure; chemoselectivity; chlorides; epoxides; hydroxylamine; organic chemistry; organobromine compounds; pyrroles
- Abstract:
- ... The chemoselective amination of alkyl bromides and chlorides with aqueous ammonia and hydroxylamine was achieved in continuous flow to produce primary ammonium salts and hydroxylamines in high yields. An in-line workup was designed to isolate the corresponding primary amine, which was also telescoped in further reactions, such as acylation and Paal–Knorr pyrrole synthesis. Monosubstituted epoxides ...
- DOI:
- 10.1021/acs.joc.8b02387
- https://doi.org/10.1021/acs.joc.8b02387
- Author:
- Michel Blitz; Robert C. Heinze; Klaus Harms; Ulrich Koert
- Source:
- Organic letters 2019 v.21 no.3 pp. 785-788
- ISSN:
- 1523-7052
- Subject:
- acylation; alcohols; aldehydes; alkylation; boron; chemical structure; diastereoselectivity; epoxidation reactions; epoxides; hydrogenation
- Abstract:
- ... A stereoselective synthetic approach to the natural product (+)-nivetetracyclate A is reported. The tetracyclic skeleton was assembled in a convergent manner by an alkylation to a diarylmethane and subsequent Friedel–Crafts acylation. Further key steps are an asymmetric Sharpless epoxidation and the boron trifluoride-mediated diastereoselective rearrangement of an epoxy alcohol to a β-hydroxy alde ...
- DOI:
- 10.1021/acs.orglett.8b04044
- https://doi.org/10.1021/acs.orglett.8b04044
- Author:
- Tianyi Na; Hao Jiang; Liang Zhao; Chengji Zhao
- Source:
- RSC advances 2017 v.7 no.85 pp. 53970-53976
- ISSN:
- 2046-2069
- Subject:
- Fourier transform infrared spectroscopy; Lewis bases; acylation; anhydrides; chemical structure; demethylation; dielectric properties; dielectrics; epoxides; fluorine; glass transition temperature; hydrophobicity; industry; naphthalene; resins; thermal stability
- Abstract:
- ... A new type of epoxy monomer 1,5-bis(4-fluorobenzoyl)-2,6-diglycidyl ether naphthalene (DGENF) was obtained through a three-step procedure involving Friedel–Crafts acylation, demethylation, and followed by nucleophilic reaction. The chemical structures were confirmed by ¹HNMR, ¹⁹FNMR and FT-IR. After curing with methylhexahydrophthalic anhydride (MeHHPA), the properties of DGENF epoxy resin were me ...
- DOI:
- 10.1039/c7ra09941j
- https://doi.org/10.1039/c7ra09941j
- Author:
- Huaifeng Li; Théo P. Gonçalves; Jinsong Hu; Qianyi Zhao; Dirong Gong; Zhiping Lai; Zhixiang Wang; Junrong Zheng; Kuo-Wei Huang
- Source:
- Journal of organic chemistry 2018 v.83 no.24 pp. 14969-14977
- ISSN:
- 1520-6904
- Subject:
- Lewis bases; acylation; alcohols; aldehydes; amines; carbon dioxide; catalytic activity; chemical structure; cycloaddition reactions; dehydrogenation; epoxides; heterocyclic nitrogen compounds; imines; ligands; organic chemistry; organocatalysts
- Abstract:
- ... In contrast to the conventional strategy of modifying the reactivities and selectivities of the transition metal and organocatalysts by varying the steric and electronic properties of organic substituent groups, we hereby demonstrate a novel approach that the sigma (σ) nucleophilicity of the imine arm can be significantly enhanced in a pseudodearomatized PN³P* pincer ligand platform to reach unpre ...
- DOI:
- 10.1021/acs.joc.8b02205
- https://doi.org/10.1021/acs.joc.8b02205
- Author:
- Haase Robert G.; Schobert Rainer
- Source:
- Organic letters 2016 v.18 no.24 pp. 6352-6355
- ISSN:
- 1523-7052
- Subject:
- acylation; bromides; epoxides; fungi; metabolites; moieties; tyrosine
- Abstract:
- ... The second total synthesis of macrocidin A afforded the bioherbicidal fungal metabolite in 16 steps starting from doubly protected l-tyrosine. The 3-octanoyl side chain with the α-methyl group and an ω-bromo epoxide already in place was attached to the tetramic acid via a Yoshii–Yoda acylation, and the macrocycle was eventually closed in 55% yield by a Williamson etherification between the phenola ...
- DOI:
- 10.1021/acs.orglett.6b03240
- https://doi.org/10.1021/acs.orglett.6b03240
- Author:
- Guang Yang; Jianping Wu; Gang Xu; Lirong Yang
- Source:
- Applied microbiology and biotechnology 2009 v.81 no.5 pp. 847-853
- ISSN:
- 0175-7598
- Subject:
- Rhizopus arrhizus; acetates; acylation; biocatalysts; enantiomers; encapsulation; epoxides; hexane; solvents
- Abstract:
- ... An efficient and convenient strategy for synthesis of enantiomerically pure S-2-(1-hydroxy-3-butenyl)-5-methylfuran was for the first time described utilizing a lipase-mediated asymmetric acylation in organic solvents. Rhizopus arrhizus lipase was chosen as the biocatalyst, and different immobilization methods including sol–gel encapsulation and covalent attachment were adopted to improve its cata ...
- DOI:
- 10.1007/s00253-008-1713-x
- PubMed:
- 18815782
- https://doi.org/10.1007/s00253-008-1713-x