- Synthesis and properties of polyethers containing 1,3-butadiene skeleton in the backbone
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Polyethers containing 1,3-butadiene skeletons in the backbone were prepared from the polycondensation of 2,3-diiode-methyl-1,3-butadiene (2b) and bisphenols (3). Although the polymerization conditions were limited due to the low reactivity of 2b, a series of polyethers was obtained under the optimized conditions. These polymers exhibited glass transition temperatures (Tgs) around 130 °C, while curing points (Tcures) were observed around 245 °C. In addition, P2b/3a afforded a network polymer by the copolymerization with styrene.
- Kohsaka, Yasuhiro,Hiramatsu, Akira
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- Synthesis of 3,4-disubstituted furans via unsaturated cyclic peroxides arising by photooxygenation of 2,3-bis (bromomethyl)-1,3-butadiene and derived exocyclic dienes
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The reaction of 2,3-bis (bromomethyl)-1,3-butadiene (3) with singlet oxygen resulted in the formation of a peroxide (4) which rearranged with CoTPP to bis(bromomethyl)furan. Zinc-induced debromination of cycloadducts which were obtained from the [2+4] Die
- Atasoy, Basri,Oezen, Recep
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- Synthesis of a short-chain fullerene dimer
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The synthesis of a short-chain fullerene dimer via bifunctional cycloaddition is demonstrated. A mono-functionalised C60 species is isolated, and has the potential for further organic functionalisation.
- Hingston, Timothy J.,Sambrook, Mark R.,Porfyrakis, Kyriakos,Briggs, G. Andrew D.
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- Novel aldehyde and thiosemicarbazone derivatives: Synthesis, spectroscopic characterization, structural studies and molecular docking studies
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In this study our purpose is that, synthesis and characterization of compounds containing the aldehyde and thiosemicarbazone groups and comparison of the theoretical results with the experimental results. The structures of all synthesized compounds were e
- Karakurt, Tuncay,Tahtaci, Hakan,Subasi, Nuriye Tuna,Er, Mustafa,A?ar, Erbil
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- Synthesis of Lignans Based on a Borate-mediated One-pot Sequential Suzuki-Miyaura Coupling of Cyclic Boranes
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Lignans are a group of polyphenolic phytochemicals that possess a large spectrum of chemical structures and biological activities. Here the syntheses of lignans – anwulignan, burseran, dehydroxycubebin, ruburisandrin B, and sesamin – are achieved based on a borate-mediated one-pot sequential Suzuki-Miyaura coupling of cis- and trans-fused bicyclic boranes, which were prepared by diastereoselective cyclic hydroboration of exo-cyclic diene with cyclopentyl- and thexylboranes, respectively. A one-pot sequential Suzuki-Miyaura coupling of each cyclic borate with various aryl bromides initiated by activation of the cyclic borane with the carbon nucleophile provided 2,3-dibenzylbutane derivatives with different aromatic substituents. Finally, the syntheses of naturally occurring lignans were accomplished in several steps from the products of Suzuki-Miyaura coupling.
- Sato, Ko,Tanaka, Hiroshi
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supporting information
p. 9422 - 9428
(2021/05/26)
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- METHOD FOR PRODUCING FLUORENE COMPOUND AND APPLICATION OF FLUORENE COMPOUND
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PROBLEM TO BE SOLVED: To provide a method for producing a fluorene compound having a spiro ring and to provide an application of the fluorene compound. SOLUTION: There is prepared a fluorene compound having a spiro ring having a vinyl group which is represented by the following formula (1) and is obtained by reacting a compound represented by the following formula (2) with a dihalo compound represented by the following formula (3). The fluorene compound represented by the formula (1) is useful for preparing a polymer excellent in optical characteristics and heat resistance by polymerization such as radical polymerization (wherein, R1 represents a substituent, n represents 0 or an integer of 1 to 2, R2a, R2b and R2c represent the same or different alkylene groups, m represents 0 or 1 and X1 and X2 represent the same or different halogen atoms.) SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
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Paragraph 0070-0071
(2021/08/21)
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- INHIBITING UBIQUITIN SPECIFIC PEPTIDASE 9X
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The disclosure provides novel chemical compounds useful as inhibitors of ubiquitin specific peptidase 9X (USP9X). USP9X inhibiting compounds are useful in the treatment of disease and disorders associated with modulation of USP9X, such as cancer.
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Paragraph 0073-0074; 0212
(2020/07/15)
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- Synthesis of constrained α-amino acid derivatives via diels-alder approach
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Synthesis of new five and seven membered outer ring diene building blocks containing α-amino acid moiety and their usage in the preparation of the constrained amino acid derivatives is described.
- Kotha, Sambasivarao,Brahmachary, Enugurthi,Sreenivasachary, Nampally
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p. 4095 - 4098
(2007/10/03)
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- SYNTHESIS OF 1,2,3,4,5,6-HEXAHYDROPYRROLOPYRROLE DIHYDROBROMIDE AND 1,2,3,5-TETRAHYDRO-2-PYRROLOPYRROLE
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Synthesis of the pyrrolopyrrole derivatives (8) and (9) is reported.Nucleophilic aromatic substitution of the 7-fluoride of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (1) by 8 under basic conditions followed by N-met
- Jendralla, Heiner,Fischer, Gerd
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p. 1291 - 1298
(2007/10/02)
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