882-33-7Relevant articles and documents
Cycloaddition Reactions of Highly Stabilized Isoquinolinium Methylides to Nonactivated Olefins and Electron-Rich Olefins
Tsuge, Otohiko,Kanemasa, Shuji,Sakamoto, Kazushige,Takenaka, Shigeori
, p. 2513 - 2524 (1988)
Highly stabilized isoquinolinium methylides bearing two electron-withdrawing substituents at the ylide carbon undergo cycloadditions with aryl-substituted olefins (acenaphthylene,(E)- and (Z)-stilbenes, indene, and stirene), alkyl-substituted olefins (norbornene, (Z)-3-hexene-1,6-dinitrile, 1-hexene, 2-propen-1-ol, and 3-(trimethylsilyloxy)propene), and electron-rich olefins (vinylene carbonate, butyl vinyl ether, and phenyl vinyl sulfide).These cycloadditions proceed in an exclusively regioselective and mostly stereoselective manner.
Structure-activity relationships of phenyl- and benzoylpyrroles
Laatsch,Renneberg,Hanefeld,Kellner,Pudleiner,Hamprecht,Kraemer,Anke
, p. 537 - 546 (1995)
Antitumor, antimicrobial, and phytotoxic activities of the marine antibiotic pentabromopseudilin (la) and related phenyl-, benzyl- and benzoyl pyrroles were compared. All activities depended strongly on the substituent pattern, with the natural compound 1a being the most active one. As judged from model reactions, a covalent bond of nucleophiles to the pyrrole system may be involved in the inhibition of macromolecular syntheses.
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Takebayashi et al.
, p. 376,377, 378 (1966)
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Metal- and solvent-free, iodine-catalyzed cyclocondensation and C[sbnd]H bond sulphenylation: A facile access to C-4 sulfenylated pyrazoles via a domino multicomponent reaction
Sun, Pengfei,Yang, Daoshan,Wei, Wei,Sun, Xuejun,Zhang, Wenhui,Zhang, Hui,Wang, Yu,Wang, Hua
, p. 2022 - 2029 (2017)
We describe herein a green and efficient MCRs protocol to synthesize C-4 sulfenylated pyrazoles by iodine-catalyzed cyclocondensation and direct C[sbnd]H bond sulphenylation reactions. Through this protocol, two new C[sbnd]N bonds and one C[sbnd]S bond ar
Schumann, H.,Albrecht, I.,Gallagher, M.,Hahn, E.,Janiak, C.,et al.
, p. 2307 - 2316 (1988)
Stereoselective access to trisubstituted fluorinated alkenyl thioethers
Fabre, Indira,Poisson, Thomas,Pannecoucke, Xavier,Gillaizeau, Isabelle,Ciofini, Ilaria,Grimaud, Laurence
, p. 1921 - 1927 (2017)
We report the first copper-catalyzed olefinic ethoxy carbonyl difluoromethylation of alkenyl thioethers via direct C-H bond functionalization using BrCF2COOEt. The developed methodology allows the preparation of trisubstituted olefins with a controlled stereochemistry. A mechanistic study is reported and a radical mechanism is revealed.
Mixed-chalcogenide diplatinum complexes; an investigation of ligand exchange processes using ESI mass spectrometry
Fortney-Zirker, Ryland G.,Henderson, William,Tiekink, Edward R.T.
, p. 83 - 96 (2017)
Routes to mixed-chalcogen diplatinum complexes have been explored using Electrospray Ionisation Mass Spectrometry (ESI-MS) as a powerful technique to probe reaction solutions on the microscale. Exchange reactions of binuclear platinum(II) complexes [Ptsu
The phenyl thiyl radical as initiator in vinyl polymerizations. Investigations into the initiation step by the aminoxyl trapping technique
Busfield, W. Ken,Heiland, Kirstin,Jenkins, Ian D.
, p. 1109 - 1112 (1995)
The reactions of phenyl thiyl radicals with styrene, methyl methacrylate, methacrylonitrile, and vinylacetate in the presence of an aminoxyl radical scavenger have been studied. Two main products were formed: diphenyl disulfide, and the expected product formed by addition of the thiyl radical to the double bond of the monomer followed by trapping by the aminoxyl radical. The relative reactivity of the monomers towards addition of phenyl thiyl radicals at 60°C was: VA:MAN:MMA:STY = 1:50:100:500.
Chemical Evolution: A Model System That Selects and Amplifies a Receptor for the Tripeptide (D)Pro(L)Val(D)Val
Hioki, Hideaki,Clark Still
, p. 904 - 905 (1998)
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Baig,Owen
, p. 1400 (1967)
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The enzymic oxidation of thiols.
Bocks
, p. 9C-11C (1966)
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Chromoselective Synthesis of Sulfonyl Chlorides and Sulfonamides with Potassium Poly(heptazine imide) Photocatalyst
Antonietti, Markus,Guldi, Dirk M.,Markushyna, Yevheniia,Savateev, Aleksandr,Schü?lbauer, Christoph M.,Ullrich, Tobias
supporting information, p. 20543 - 20550 (2021/08/12)
Among external stimuli used to promote a chemical reaction, photocatalysis possesses a unique one—light. Photons are traceless reagents that provide an exclusive opportunity to alter chemoselectivity of the photocatalytic reaction varying the color of incident light. This strategy may be implemented by using a sensitizer capable to activate a specific reaction pathway depending on the excitation light. Herein, we use potassium poly(heptazine imide) (K-PHI), a type of carbon nitride, to generate selectively three different products from S-arylthioacetates simply varying the excitation light and otherwise identical conditions. Namely, arylchlorides are produced under UV/purple, sulfonyl chlorides with blue/white, and diaryldisulfides at green to red light. A combination of the negatively charged polyanion, highly positive potential of the valence band, presence of intraband states, ability to sensitize singlet oxygen, and multi-electron transfer is shown to enable this chromoselective conversion of thioacetates.
Transformation of arylboronic acids with sodium thiosulfate into organodisulfides catalyzed by a recyclable polyoxometalate-based Cr(iii) catalyst
Chang, Yalin,Li, Huiyi,Tao, Chaofu,Wang, Aiping,Wei, Yongge,Xie, Ya,Yu, Han,Yu, Shunming
supporting information, p. 6059 - 6064 (2021/08/23)
Organo disulfides represent an abundant class of compounds in chemical biology, pharmaceutical fields, and industry. They are traditionally synthesized by the oxidation of mercaptan in the presence of an organic ligand supported metal catalyst or toxic oxidants under harsh conditions. Here, we disclose a highly-efficient pathway in which disulfide is synthesized by organic boric acid and Na2S2O3 using the catalyst (NH4)3[CrMo6O18(OH)6], demonstrating a high activity and excellent selectivity. Various boric acid derivatives have been successfully transformed into the corresponding disulfides. Mechanistic insights have been furnished based on the observation of intermediate and control experiments.
