Selective Synthesis of Monofluorinated Compounds Applying Amine/HF Reagents.
Sign Up to like & getrecommendations! Published in 2023 at "Chemical record"
DOI: 10.1002/tcr.202300140
Abstract: For nucleophilic monofluorination, amine/HF reagents such as Et3 N⋅3HF, Pyr⋅9HF (Olah's reagent) and similar combinations belong to the most frequently used fluoride sources, whereupon the selectivity of these reagents can be very different depending of… read more here.
Keywords: selective synthesis; amine reagents; synthesis monofluorinated; applying amine ... See more keywords
SELECTIVE SYNTHESIS OF A NOVEL GLYCOLURIL-BASED HYBRID COMPOUND WITH HIGH APPLICATION POTENTIAL
Sign Up to like & getrecommendations! Published in 2021 at "Chemistry of Heterocyclic Compounds"
DOI: 10.1007/6179
Abstract: Highly selective synthesis of a new antipyrine-substituted tetracycle was implemented on the basis of a modified Mannich reaction as a result of the condensation of glycoluril with 4-aminoantipyrine in formalin without the use of catalysts. read more here.
Keywords: synthesis novel; selective synthesis; novel glycoluril; glycoluril based ... See more keywords
Selective Synthesis of 2-Methylidenepyrrol-3-Ones from Diynones and Amines
Sign Up to like & getrecommendations! Published in 2019 at "Chemistry of Heterocyclic Compounds"
DOI: 10.1007/s10593-019-02515-4
Abstract: Addition of primary amines to 1-phenyl-5-trimethylsilylpenta-1,4-diyn-3-one with subsequent cyclization affords 5-phenyl-2-(trimethylsilylmethylidene)-1,2-dihydro-3H-pyrrol-3-ones. Both electron-rich and electron-deficient anilines and alkyl amines provide regio- and stereoselective formation of single product in high yields. The two-step transformation benefits from… read more here.
Keywords: ones diynones; selective synthesis; diynones amines; methylidenepyrrol ones ... See more keywords
Condition-controlled selective synthesis of hydroxyl(indolyl)- and bis(indolyl)barbiturates
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Iranian Chemical Society"
DOI: 10.1007/s13738-017-1075-3
Abstract: By combining the structural features of indole and barbituric acid, new hybrid molecules were designed and synthesized. Hydroxy(indolyl)barbiturates and bis(indolyl)barbiturates were selectively prepared via the reaction of indoles with alloxan derivatives in various conditions.Graphical Abstract read more here.
Keywords: bis indolyl; indolyl barbiturates; selective synthesis; controlled selective ... See more keywords
Selective synthesis of γ-valerolactone from levulinic and formic acid over ZnAl mixed oxide
Sign Up to like & getrecommendations! Published in 2021 at "Chemical Engineering Journal"
DOI: 10.1016/j.cej.2021.128902
Abstract: Abstract After testing different mixed oxides, a very promising catalyst to obtain γ-valerolactone from levulinic acid and formic acid is proposed in this work: a ZnAl hydrotalcite-derived material. Optimum conditions (T = 140 °C, FA/LA = 5/1, aqueous phase stirred… read more here.
Keywords: formic acid; synthesis valerolactone; valerolactone levulinic; selective synthesis ... See more keywords
Selective synthesis of polyamines in multipurpose plants
Sign Up to like & getrecommendations! Published in 2018 at "Chemical Engineering Science"
DOI: 10.1016/j.ces.2018.04.036
Abstract: Abstract A number of reaction processes undergo yield drops since an intermediate target species can further react with one of the reactants generating lower volatility by-products. Such reactions are typically fast and non-selective, so that… read more here.
Keywords: selective synthesis; multipurpose plants; polyamines multipurpose; synthesis polyamines ... See more keywords
Pd(II) and Pt(II) catalysed selective synthesis of furfuryl alcohol: Solvent effects and insights into the mechanism
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Organometallic Chemistry"
DOI: 10.1016/j.jorganchem.2020.121362
Abstract: Abstract Selective conversion of furfural to furfural alcohol, a bio-based commodity chemical with applications in the agriculture, metal casting and polymer industries is presented. Pd(II) and Pt(II) complexes were synthesized and characterized using multi-nuclear magnetic… read more here.
Keywords: mechanism; selective synthesis; catalysed selective; spectroscopy ... See more keywords
Highly selective synthesis of tricyclic compounds from semithioglycoluril, formaldehyde and amines
Sign Up to like & getrecommendations! Published in 2019 at "Mendeleev Communications"
DOI: 10.1016/j.mencom.2019.05.028
Abstract: A highly selective one-pot synthesis of new 6-substituted 4-thioxohexahydro-5H-2,3,4a,6,7a-pentaazacyclopenta[cd]inden-1(2H)-ones by cycloaminomethylation of semithioglycolurile with formaldehyde and amines is proposed. A mechanism for the process is suggested. read more here.
Keywords: highly selective; synthesis tricyclic; formaldehyde amines; selective synthesis ... See more keywords
Site-Selective Synthesis of Insulin Azides and Bioconjugates.
Sign Up to like & getrecommendations! Published in 2019 at "Bioconjugate chemistry"
DOI: 10.1021/acs.bioconjchem.9b00069
Abstract: A synthetic method to access novel azido-insulin analogs directly from recombinant human insulin (RHI) was developed via diazo-transfer chemistry using imidazole-1-sulfonyl azide. Systematic optimization of reaction conditions led to site-selective azidation of amino acids B1-phenylalanine… read more here.
Keywords: site selective; insulin; chemistry; selective synthesis ... See more keywords
Highly Selective Synthesis of Octahydroaminoacridineover Mesoporous ZnAlMCM-41 Catalysts
Sign Up to like & getrecommendations! Published in 2020 at "Industrial & Engineering Chemistry Research"
DOI: 10.1021/acs.iecr.0c02283.s001
Abstract: A very ecofriendly heterogeneous catalytic method has been used for the highly selective synthesis of octahydroaminoacridine/1,2,3,4,5,6,7,8-octahydroacridin-9-amine (OA) by a single-step vapor phase cyclization of cyclohexanone (CHCO) with a mixture of formamide (HCONH2) and ammonia (NH3)… read more here.
Keywords: znalmcm catalysts; highly selective; selective synthesis; mesoporous znalmcm ... See more keywords
Selective Synthesis of Phenanthrenes and Dihydrophenanthrenes via Gold-Catalyzed Cycloisomerization of Biphenyl Embedded Trienynes.
Sign Up to like & getrecommendations! Published in 2020 at "Organic letters"
DOI: 10.1021/acs.orglett.0c03067
Abstract: Readily available o'-alkenyl-o-alkynylbiaryls, a particular type of 1,7-enynes, undergo a selective cycloisomerization reaction in the presence of a gold(I) catalyst to give interesting phenanthrene and dihydrophenanthrene derivatives in high yields. The solvent used provokes a… read more here.
Keywords: phenanthrenes dihydrophenanthrenes; dihydrophenanthrenes via; selective synthesis; synthesis phenanthrenes ... See more keywords