NHC‐Au‐Catalyzed Isomerization of Propargylic B(MIDA)s to Allenes and Double Isomerization of Alkynes to 1,3‐Dienes
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DOI: 10.1002/advs.202308710
Abstract: The synthesis of allenyl boronates is an important yet challenging topic in organic synthesis. Reported herein is an NHC‐gold‐catalyzed 1,3‐H shift toward allenyl boronates synthesis from simple propargylic B(MIDA)s. Mechanistic studies suggest dual roles of… read more here.
Keywords: isomerization propargylic; nhc catalyzed; catalyzed isomerization; mida allenes ... See more keywords
Palladium‐Catalyzed Isomerization/(Cyclo)carbonylation of Pentenamides: a Mechanistic Study of the Chemo‐ and Regioselectivity
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DOI: 10.1002/cctc.201700345
Abstract: A new isomerizing ring‐closing amidocarbonylation reaction is reported using Pd catalysis with bulky diphosphane ligands. From terminal as well as internal pentenamide isomers (PAs), cyclic imides were obtained in good yield (92 %) with cationic Pd… read more here.
Keywords: isomerization cyclo; regioselectivity; study; isomerization ... See more keywords
Platinum‐catalyzed Isomerization of Cyclopropenes to 1,3‐Dienes
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DOI: 10.1002/hlca.202400105
Abstract: Herein we report a platinum‐catalyzed isomerization of cyclopropenes to 1,3‐dienes. Diverse dienylated alcohols were obtained in 42‐98% yield. The synthetic potential of the products was demonstrated by their use in Diels‐Alder cycloadditions with various dienophiles.… read more here.
Keywords: cyclopropenes dienes; catalyzed isomerization; isomerization cyclopropenes; platinum catalyzed ... See more keywords
Microwave assisted base-catalyzed 1,3-isomerization of 7-substituted cycloheptatriene bearing electron withdrawing groups
Sign Up to like & getrecommendations! Published in 2020 at "Journal of King Saud University - Science"
DOI: 10.1016/j.jksus.2018.05.013
Abstract: Abstract A series of 7-substituted cycloheptatrienes bearing EDG such as (3, X = –PPh3+, –P(O)Ph2, –SO2C6H4CH3, –OCOC6H4CH3 and –CN) were synthesized and their isomerization into the corresponding 2-isomers (4–8) has been achieved, under controlled microwave heating in… read more here.
Keywords: assisted base; isomerization substituted; microwave assisted; isomerization ... See more keywords
Nickel-Catalyzed Isomerization of Homoallylic Alcohols.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.3c01201
Abstract: Nickel-catalyzed isomerizations of homoallylic alcohols and a bishomoallylic alcohol are presented. These isomerization reactions occur in the presence of a simple nickel catalyst that does not require addition of an exogenous ligand. The corresponding ketone… read more here.
Keywords: nickel catalyzed; isomerization homoallylic; homoallylic alcohols; catalyzed isomerization ... See more keywords
Palladium-Catalyzed Isomerization/Hydrocarbonylation of Electron-Deficient Alkenes for the Construction of Lactones and Lactams.
Sign Up to like & getrecommendations! Published in 2024 at "Organic letters"
DOI: 10.1021/acs.orglett.4c03330
Abstract: An efficient palladium-catalyzed isomerization/hydrocarbonylation of electron-deficient alkenes was developed, affording a variety of benzofuran-2(3H)-ones, dihydrofuran-2(3H)-ones, indolin-2-ones, and isochroman-3-ones in high yields. The reaction exhibits excellent regioselectivity, high atom economy, and a broad range of substrates.… read more here.
Keywords: palladium catalyzed; isomerization hydrocarbonylation; hydrocarbonylation electron; electron deficient ... See more keywords
Mechanistic Studies of Pd(II)-Catalyzed E/Z Isomerization of Unactivated Alkenes: Evidence for a Monometallic Nucleopalladation Pathway.
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DOI: 10.1021/acscatal.1c00783
Abstract: Pd(II)-catalyzed E/Z isomerization of alkenes is a common process-yet its mechanism remains largely uncharacterized, particularly with non-conjugated alkenes. In this work, the mechanism of Pd(II)-catalyzed E/Z isomerization of unactivated olefins containing an aminoquinoline-based amide directing… read more here.
Keywords: monometallic nucleopalladation; isomerization unactivated; isomerization; catalyzed isomerization ... See more keywords
Ru-Catalyzed Isomerization of Achmatowicz Derivatives: A Sustainable Route to Biorenewables and Bioactive Lactones
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DOI: 10.1021/acscatal.2c04867
Abstract: A Ru-catalyzed isomerization of Achmatowicz derivatives that opens unexplored routes to diversify the biogenic furanic platform is reported. The mechanistic insights of this formally redox-neutral intramolecular process were studied computationally and by deuterium labeling. The… read more here.
Keywords: achmatowicz derivatives; derivatives sustainable; isomerization achmatowicz; catalyzed isomerization ... See more keywords
Cobalt(0)-Catalyzed Isomerization of Allylamines Promoted by Monodentate Benzofuran Phosphines
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DOI: 10.1021/jacs.5c09017
Abstract: Isomerization of C–C double bonds is an efficient tool for converting bulk olefins into high-value compounds. Herein we describe a newly developed homogeneous cobalt-based system which enables the isomerization of allylamines to enamines with similar… read more here.
Keywords: benzofuran; cobalt catalyzed; catalyzed isomerization; isomerization allylamines ... See more keywords
Ru-catalyzed isomerization of ω-alkenylboronates towards stereoselective synthesis of vinylboronates with subsequent in situ functionalization†
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DOI: 10.1039/d0sc02542a
Abstract: The stereoselective preparation of synthetically versatile vinylboronates from ω-alkenylboronates is achieved through a ruthenium-catalyzed isomerization reaction. A variety of di- and trisubstituted vinylboronates were conveniently produced and could be used as a new starting point… read more here.
Keywords: catalyzed isomerization; subsequent situ; isomerization alkenylboronates; functionalization ... See more keywords