Articles with "membered cyclic" as a keyword



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Reversal of Stereoselectivity in Cycloadditions of Five‐Membered Cyclic Nitrones Derived from Hexoses

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Published in 2017 at "European Journal of Organic Chemistry"

DOI: 10.1002/ejoc.201601488

Abstract: Two five-membered cyclic nitrones derived from hexoses, a newly synthesized D-allo-configured nitrone and an already known D-talo-configured nitrone, have been examined in 1,3-dipolar cycloaddition reactions with vinyl acetate, allyl benzoate, methyl acrylate, acrylonitrile, and vinylene… read more here.

Keywords: cyclic nitrones; membered cyclic; derived hexoses; five membered ... See more keywords
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CO2 capture capacity of five- and six-membered cyclic amidines bearing silatranyl group under dry conditions

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Published in 2017 at "Tetrahedron"

DOI: 10.1016/j.tet.2017.01.012

Abstract: Abstract CO 2 capture and release behaviors of three amidines bearing silatranyl group in DMSO solution were evaluated under dry conditions containing a very small amount of water. A six-membered cyclic amidine with silatranyl group… read more here.

Keywords: silatranyl group; group; membered cyclic; bearing silatranyl ... See more keywords
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Copper-catalyzed borylative cyclization of 1,n-enynyl phosphates leading to five- to eight-membered cyclic 1,4-dienyl boronates

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Published in 2017 at "Tetrahedron Letters"

DOI: 10.1016/j.tetlet.2017.02.059

Abstract: Abstract We report here a room temperature, efficient, and broadly applicable copper-catalyzed borylative cyclization of 1,n-enynyl (n = 6–9) phosphates for the concise synthesis of structurally diverse 5–8 membered cyclic 1,4-dienyl boronates, which represents the first Cu-catalyzed… read more here.

Keywords: cyclization enynyl; enynyl phosphates; copper catalyzed; membered cyclic ... See more keywords
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The Elusive Seven-Membered Cyclic Imino Ether Tetrahydrooxazepine.

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Published in 2018 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.8b10918

Abstract: Cyclic imino ether heterocycles are used as ligands in transition metal catalysis, in various drugs and as reactive monomers in living cationic ring-opening polymerization (CROP). While five- and six-membered cyclic imino ethers, i.e. 2-oxazolines and… read more here.

Keywords: cyclic imino; imino; membered cyclic; imino ether ... See more keywords
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Synthesis of a 12-membered cyclic siloxane possessing alkoxysilyl groups as a nanobuilding block and its use for preparation of gas permeable membranes

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Published in 2017 at "RSC Advances"

DOI: 10.1039/c7ra09380b

Abstract: A 12-membered cyclic siloxane possessing alkoxysilyl groups was synthesized as a nanobuilding block for siloxane-based materials by the alkoxysilylation of organometallasiloxane containing a 12-membered ring with Si–Me and Si–O− groups as the side groups. The… read more here.

Keywords: possessing alkoxysilyl; alkoxysilyl groups; membered cyclic; cyclic siloxane ... See more keywords
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Synthesis of five-membered cyclic nitrones based on the Lewis acid-catalysed [3+2]-annulation reaction of donor-acceptor cyclopropanes with 1,4,2-dioxazoles.

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Published in 2018 at "Chemical communications"

DOI: 10.1039/c8cc04656e

Abstract: A novel synthesis of five-membered cyclic nitrones has been developed based on the Lewis acid-catalysed [3+2]-annulation reaction of D-A cyclopropanes with 1,4,2-dioxazoles. Broad substrate scope and generally good yield make this reaction useful in the… read more here.

Keywords: cyclic nitrones; membered cyclic; synthesis five; reaction ... See more keywords
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Synthesis of degradable and chemically recyclable polymers using 4,4-disubstituted five-membered cyclic ketene hemiacetal ester (CKHE) monomers

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Published in 2021 at "Chemical Science"

DOI: 10.1039/d1sc03560f

Abstract: Novel degradable and chemically recyclable polymers were synthesized using five-membered cyclic ketene hemiacetal ester (CKHE) monomers. The studied monomers were 4,4-dimethyl-2-methylene-1,3-dioxolan-5-one (DMDL) and 5-methyl-2-methylene-5-phenyl-1,3-dioxolan-4-one (PhDL). The two monomers were synthesized in high yields (80–90%), which… read more here.

Keywords: recyclable polymers; membered cyclic; chemically recyclable; degradable chemically ... See more keywords

Utilization of Borane-Catalyzed Hydrosilylation as a Dearomatizing Tool: Six-Membered Cyclic Amidine Synthesis from Isoquinolines and Pyridines

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Published in 2020 at "Synthesis"

DOI: 10.1055/s-0040-1707323

Abstract: In this study, a convenient strategy to synthesize six-membered­ cyclic amidines from isoquinolines and pyridines has been developed. Borane-catalyzed hydrosilylation of each N-heteroarene was utilized as a dearomatizing tool. Substrate scope is broad with respect… read more here.

Keywords: catalyzed hydrosilylation; six membered; isoquinolines pyridines; membered cyclic ... See more keywords
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Crystal structures of eight- and ten-membered cyclic bisanisylphosphonothioyl disulfanes and comparison with their P-ferrocenyl analogues

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Published in 2018 at "Acta Crystallographica Section E: Crystallographic Communications"

DOI: 10.1107/s2056989018001068

Abstract: Two new crystal structures of eight- and ten-membered cyclic bisanisylphosphonothioyl disulfanes have been determined and these are compared to the structures of their ferrocenyl analogues. read more here.

Keywords: cyclic bisanisylphosphonothioyl; ten membered; membered cyclic; crystal structures ... See more keywords
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A Short Step Conversion of Alkynyl Propargyl Sulfones into Six-Membered Cyclic β-Ketosulfones via an Amine-Induced Novel Ring Closure

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Published in 2018 at "Natural Product Communications"

DOI: 10.1177/1934578x1801300519

Abstract: Alkynyl propargyl sulfones underwent secondary amine-induced cyclization to give six-membered cyclic enaminosulfones, and the products were subjected to acidic hydrolysis to afford the corresponding cyclic β-ketosulfones in high yields. read more here.

Keywords: propargyl sulfones; six membered; alkynyl propargyl; cyclic ketosulfones ... See more keywords