- A Convenient One-Pot Synthesis of Acenaphthenequinones from 1-Acenaphthenones by NBS-DMSO Oxidation
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Acenaphthenequinone was obtained in 95percent yield whwn the teaction of 1-acenaphthenone with N-bromosuccinimide was carried uot in dimethyl sulfoxide at room temperature.Under similar conditions, several acenaphthenequinones were prepared from the corresponding 1-acenaphthenones in good yield.
- Tatsugi, Jiro,Okumura, Shigeo,Izawa, Yasuji
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- Visibly Emitting Thiazolyl-Uridine Analogues as Promising Fluorescent Probes
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Microenvironment-sensitive fluorescent (ESF) nucleosides are powerful tools for nucleic acid research. The new 5-substituted uridine analogues are synthesized, which comprise a 4H-cyclopenta[d]thiazole ring obtained by the Hantzsch synthesis reaction of 5-thioamide-uridine with aromatic α-bromocarbonyl compounds. The emission maximum of new compounds is in the visible region. They exhibit strong solvent- A nd pH-dependent fluorescent properties, indicating their promising ability to be fluorescent probes.
- Li, Jinsi,Fang, Xuerong,Ming, Xin
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p. 4602 - 4610
(2020/05/01)
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- Palladium-catalyzed trimerization of strained cycloalkynes: Synthesis of decacyclene
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Palladium-catalyzed cyclotrimerization was applied to three strained cycloalkynes. Pd(PPh3)4 and Pt(PPh3)4-catalyzed cyclotrimerizations of cyclohexyne (2) afforded dodecahydrotriphenylene (3) in 64% and 62% yields, respectively, but subjecting cyclopentyne to the same conditions failed to afford isolable amounts of the cyclotrimer. Finally, decacyclene (15), a putative C60-fullerene precursor, was obtained in 23% yield by Pd2(dba)3-catalyzed cyclotrimerization of acenaphthyne (14).
- Iglesias, Beatriz,Pe?a, Diego,Pérez, Dolores,Guitián, Enrique,Castedo, Luis
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p. 486 - 488
(2007/10/03)
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