Atmospheric hydrogenation of α, β-unsaturated ketones catalyzed by highly efficient and recyclable Pd nanocatalyst
Sign Up to like & getrecommendations! Published in 2019 at "Catalysis Communications"
DOI: 10.1016/j.catcom.2019.03.008
Abstract: Abstract A thermoregulated phase-transfer Pd nanocatalyst was explored firstly and shown to be highly efficient and recyclable in the atmospheric hydrogenation of α, β-unsaturated ketones. Under optimized reaction conditions, the conversion of chalcone and the… read more here.
Keywords: unsaturated ketones; atmospheric hydrogenation; efficient recyclable; highly efficient ... See more keywords
Chelate ring size effects of Ir(P,N,N) complexes: Chemoselectivity switch in the asymmetric hydrogenation of α,β-unsaturated ketones
Sign Up to like & getrecommendations! Published in 2020 at "Catalysis Communications"
DOI: 10.1016/j.catcom.2020.106128
Abstract: Abstract A novel, highly modular approach has been developed for the synthesis of new chiral P,N,N ligands with the general formula Ph2P(CH3)CH(CH2)mCH(CH3)NHCH2CH2(CH2)nN(CH3)2 and Ph2P(CH3)CHCH2CH(CH3)NHCH2(CH2)n-2-Py (m, n = 0, 1). The systematic variation of their P N and… read more here.
Keywords: chemoselectivity; ch3; unsaturated ketones; switch ... See more keywords
Diastereoselective synthesis of functionalized tetrahydro-γ-carbolines via a [3 + 3] cycloaddition of 2,2′-diester aziridines with β-(indol-2-yl)-α,β-unsaturated ketones
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Chemical Letters"
DOI: 10.1016/j.cclet.2019.09.002
Abstract: Abstract A Sc(OTf)3-catalyzed [3 + 3] cycloaddition of 2,2′-diester aziridines with β-(indol-2-yl)-α,β-unsaturated ketones was developed, affording polysubstituted tetrahydro-γ-carbolines in single diastereoisomers in good to excellent yields. read more here.
Keywords: tetrahydro carbolines; diester aziridines; unsaturated ketones; aziridines indol ... See more keywords
Bismuth trichloride-catalyzed oxy-Michael addition of water and alcohol to α,β-unsaturated ketones
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Chemical Letters"
DOI: 10.1016/j.cclet.2019.09.017
Abstract: Abstract An efficient method was developed for the conjugate addition of water to various α,β-unsaturated ketones by using bismuth(III) chloride as a catalyst. The reactions proceeded smoothly in the presence of a catalytic amount of… read more here.
Keywords: bismuth trichloride; addition water; addition; unsaturated ketones ... See more keywords
Kinetic and mechanism studies of the ozonolysis of three unsaturated ketones.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of environmental sciences"
DOI: 10.1016/j.jes.2020.03.031
Abstract: Reaction rate constants and products of 1-octen-3-one, 3-octen-2-one and 4-hexen-3-one with ozone were studied in a 100-L fluorinated ethylene propylene (FEP) Teflon film bag using absolute rate method at 298 ± 1 K and atmospheric pressure. The rate… read more here.
Keywords: mechanism; unsaturated ketones; three unsaturated; rate constants ... See more keywords
The two-top molecule 3-penten-2-one: Acetyl methyl torsion in α,β-unsaturated ketones
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Molecular Structure"
DOI: 10.1016/j.molstruc.2021.131337
Abstract: Abstract Using a molecular jet Fourier transform spectrometer, the microwave spectrum of E-3-penten-2-one, also called methyl propenyl ketone, was recorded in a range from 2.0 to 26.5 GHz. Two conformers, antiperiplanar (ap) and synperiplanar (sp), could… read more here.
Keywords: penten one; acetyl methyl; unsaturated ketones; methyl ... See more keywords
Silica gel-promoted synthesis of multisubstituted spiroindolenines from tryptamines and γ-chloro-α,β-unsaturated ketones
Sign Up to like & getrecommendations! Published in 2021 at "Tetrahedron"
DOI: 10.1016/j.tet.2020.131765
Abstract: ABSTRACT Here we report a one-pot synthesis of multisubstituted spiroindolenines from a series of tryptamine derivatives with γ-chloro-α,β-unsaturated ketones. The reaction sequence consists of base-induced condensation and silica gel-promoted intramolecular Michael addition. The target molecules… read more here.
Keywords: unsaturated ketones; synthesis multisubstituted; multisubstituted spiroindolenines; chloro unsaturated ... See more keywords
Asymmetric epoxidation of α,β-unsaturated ketones via an amine-thiourea dual activation catalysis
Sign Up to like & getrecommendations! Published in 2021 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2021.152941
Abstract: Abstract A simple asymmetric epoxidation method is developed to effectively synthesize chiral α-carbonyl epoxides through an amine-thiourea dual activation catalysis. In this method, TBHP, as an oxidant, determined the reaction rate, and the chiral amine-thiourea… read more here.
Keywords: thiourea dual; activation catalysis; unsaturated ketones; dual activation ... See more keywords
Highly Diastereo- and Enantioselective Palladium-Catalyzed [3 + 2] Cycloaddition of Vinyl Epoxides and α,β-Unsaturated Ketones.
Sign Up to like & getrecommendations! Published in 2017 at "Organic letters"
DOI: 10.1021/acs.orglett.7b03386
Abstract: An asymmetric [3 + 2] cycloaddition reaction of vinyl epoxides with α,β-unsaturated ketones, the single activated electron-deficient alkenes, has been achieved under Pd-catalysis in excellent diastereo- and enantioselectivity. The utilities of the protocol are demonstrated… read more here.
Keywords: epoxides unsaturated; highly diastereo; cycloaddition; unsaturated ketones ... See more keywords
Formal Asymmetric Cycloaddition of Activated α,β-Unsaturated Ketones with α-Diazomethylphosphonate Mediated by a Chiral Silver SPINOL Phosphate Catalyst.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.8b03436
Abstract: An efficient method for preparing highly functionalized chiral nonspiro-phosphonylpyrazolines via an asymmetric formal 1,3-dipolar cycloaddition reaction of α-diazomethylphosphonate with activated, acyclic α,β-unsaturated ketones, bearing an additional nitrile electron-withdrawing group, has been developed, utilizing an in… read more here.
Keywords: diazomethylphosphonate; cycloaddition; unsaturated ketones; phosphate catalyst ... See more keywords
α-Nitro-α,β-Unsaturated Ketones: An Electrophilic Acyl Transfer Reagent in Catalytic Asymmetric Friedel-Crafts and Michael Reactions.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.9b02310
Abstract: Herein, we introduce α-nitro-α,β-unsaturated ketones as efficient electrophilic acyl transfer reagents, and they were employed in Friedel-Crafts as well as in Michael reactions. The desired acyl transfer products of these reactions were obtained in high… read more here.
Keywords: electrophilic acyl; acyl transfer; unsaturated ketones; michael reactions ... See more keywords