Facile and expedient synthesis of α,β-unsaturated isoxazol-5(4H)-ones under mild conditions
Sign Up to like & getrecommendations! Published in 2019 at "Research on Chemical Intermediates"
DOI: 10.1007/s11164-019-03999-7
Abstract: Abstract It was found that nano-SiO 2 –H 2 SO 4 was catalyzed by the three-component cyclocondensation of aryl/heteroaryl aldehydes, hydroxylamine hydrochloride, and β -ketoesters toward the synthesis of α , β -unsaturated isoxazol-5(4 H )-ones… read more here.
Keywords: facile expedient; mild conditions; unsaturated isoxazol; synthesis unsaturated ... See more keywords
Oxygen Vacancy-Dependent Photocatalytic Selective Synthesis of an Unsaturated Amide on Spinel CuFe2O4.
Sign Up to like & getrecommendations! Published in 2023 at "Inorganic chemistry"
DOI: 10.1021/acs.inorgchem.2c02371
Abstract: Oxygen vacancies can change the physical and chemical properties of oxide semiconductors, which is applied to the field of ph otocatalysis, including water splitting, carbon dioxide reduction, and organic synthesis. However, the mechanism of oxygen… read more here.
Keywords: unsaturated amide; synthesis unsaturated; synthesis; spinel cufe2o4 ... See more keywords
Synthesis of Unsaturated Silyl Heterocycles via an Intramolecular Silyl-Heck Reaction.
Sign Up to like & getrecommendations! Published in 2019 at "Organometallics"
DOI: 10.1021/acs.organomet.9b00498
Abstract: We report the synthesis of unsaturated silacycles via an intramolecular silyl-Heck reaction. Using palladium catalysis, silicon electrophiles tethered to alkenes cyclize to form 5- and 6-membered silicon heterocycles. The effects of alkene substitution and tether… read more here.
Keywords: silyl heck; silyl; via intramolecular; synthesis unsaturated ... See more keywords
Olefination with Sulfonyl Halides and Esters: Synthesis of Unsaturated Sulfonyl Fluorides
Sign Up to like & getrecommendations! Published in 2022 at "Organic Letters"
DOI: 10.1021/acs.orglett.2c01604
Abstract: Methanedisulfonyl fluoride, CH2(SO2F)2, transforms aromatic aldehydes into β-arylethenesulfonyl fluorides, useful substrates for the SuFEx “click”-type transformations. The reaction mimics mechanism of the Horner–Wadsworth–Emmons olefination, which runs via addition of the carbanion, followed by cyclization–fragmentation of… read more here.
Keywords: synthesis unsaturated; olefination sulfonyl; unsaturated sulfonyl; halides esters ... See more keywords
Efficient and stereodivergent synthesis of unsaturated acyclic fragments bearing contiguous stereogenic elements
Sign Up to like & getrecommendations! Published in 2018 at "Nature chemistry"
DOI: 10.1038/s41557-018-0123-7
Abstract: Synthetic organic strategies that enable the catalytic and rapid assembly of a large array of organic compounds that possess multiple stereocentres in acyclic systems are somewhat rare, especially when it comes to reaching today’s high… read more here.
Keywords: stereogenic elements; synthesis unsaturated; efficient stereodivergent; stereodivergent synthesis ... See more keywords
Phase-transfer catalyzed asymmetric synthesis of α,β-unsaturated γ,γ-disubstituted γ-lactams.
Sign Up to like & getrecommendations! Published in 2017 at "Chemical communications"
DOI: 10.1039/c7cc01058c
Abstract: The direct enantioselective vinylogous Michael addition of unsaturated γ-monosubstituted γ-lactams was realized by using chiral phase-transfer catalysis as a means to give enantioenriched γ,γ-disubstituted γ-lactams. read more here.
Keywords: catalyzed asymmetric; transfer catalyzed; phase transfer; synthesis unsaturated ... See more keywords
Enzymatic synthesis of unsaturated polyesters: functionalization and reversibility of the aza-Michael addition of pendants
Sign Up to like & getrecommendations! Published in 2019 at "Polymer Chemistry"
DOI: 10.1039/c8py01655k
Abstract: Enzymatic synthesis of unsaturated polyesters and the temperature-dependent reversibility of the aza-Michael addition of diethyl amine pendants. read more here.
Keywords: synthesis unsaturated; enzymatic synthesis; aza michael; unsaturated polyesters ... See more keywords
Direct Synthesis of β,γ-Unsaturated α-Keto Esters from Aldehydes and Pyruvates
Sign Up to like & getrecommendations! Published in 2019 at "Synlett"
DOI: 10.1055/s-0037-1612255
Abstract: Herein, we describe two practical methods to synthesize β,γ-unsaturated α-keto esters directly from aldehydes and pyruvates promoted by BF3•Et2O in the presence of Ac2O or by Ti(OEt)4 under mild conditions. A variety of aromatic aldehydes… read more here.
Keywords: synthesis unsaturated; aldehydes pyruvates; unsaturated keto; keto esters ... See more keywords
Synthesis of Unsaturated Spiroacetals, Cyclopentanone Derivatives, in the Presence of Natural Aluminosilicate Modified with Zirconium Cations
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DOI: 10.1134/s0965544119060021
Abstract: Conditions for the condensation of cyclopentanone and n-valeric aldehyde to 2-pentylidenecyclopentanone in the presence of an alcoholic solution of piperidine have been developed. The isomerization of the latter in a continuous-flow system over γ-Al2O3 yields… read more here.
Keywords: synthesis unsaturated; presence; natural aluminosilicate; unsaturated spiroacetals ... See more keywords
Multicomponent Synthesis of Unsaturated γ-Lactam Derivatives. Applications as Antiproliferative Agents through the Bioisosterism Approach: Carbonyl vs. Phosphoryl Group
Sign Up to like & getrecommendations! Published in 2022 at "Pharmaceuticals"
DOI: 10.3390/ph15050511
Abstract: We report efficient synthetic methodologies for the preparation of 3-amino and 3-hydroxy 3-pyrrolin-2-ones (unsaturated γ-lactams) through a multicomponent reaction of amines, aldehydes and acetylene or pyruvate derivatives. The densely substituted γ-lactam substrates show in vitro… read more here.
Keywords: synthesis unsaturated; lactam derivatives; derivatives applications; unsaturated lactam ... See more keywords