Total Synthesis of Indotertine A and Drimentines A, F, and G

Sun, Yu; Li, Ruofan; Zhang, Wenhao; Li, Ang

doi:10.1002/ange.201303334

Cited by 39 publications

(16 citation statements)

References 78 publications

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“…Notably, 31 and 32 were inert under the mild acidic conditions described above. This reaction is similar to the bioinspired transformation from drimentine F into indotertine A reported by us previously, [11] in which the postulated cationic intermediate undergoes a regiospecific proton elimination to form the trisubstituted C=C bond. We then repeated the oxidation/cyclization sequence from 21 and prolonged the times of acid treatment.…”

supporting

confidence: 85%

“…It is noteworthy that a similar aza-Prins reaction was observed during our synthesis of indotertine A. [11] A Friedel-Crafts annulation and subsequent retro Friedel-Crafts fragmentation would then deliver 1, presumably through the intermediacy of the dearomatized 7. The driving force of this cascade may be attributable to the steric proximity of the positive charges and the electron-rich functionalities, as well as the re-aromatization of 7.…”

supporting

confidence: 65%

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Bioinspired Total Synthesis of Sespenine

et al. 2014

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The first total synthesis of sespenine, a rare indole sesquiterpenoid from a mangrove endophyte, has been accomplished. A bioinspired aza-Prins/Friedel-Crafts/retro Friedel-Crafts cascade reaction assembles the bridged tetrahydroquinoline core. Further investigations on the aza-Prins cyclization imply that the C3 configuration of the hydroxyindolenine intermediate is crucial to the biosynthesis of sespenine and its congener xiamycin A.

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supporting

confidence: 85%

supporting

confidence: 65%

Bioinspired Total Synthesis of Sespenine

et al. 2014

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“…Two emission bands could be observed for these five samples. The emission at around 380-400 nm is the characteristic near-band-edge emission due to the recombination of free photogenerated electrons and holes [44] and the other one is a deep-level emission mostly in the green region (471 nm), which is produced by the transition of excited optical centers from the deep level to the valence level, such deep-level emission being usually accompanied by the presence of structural defects [19,45]. The red-shift of UV emission was observed from 390 to 412 nm due to the increase in size of the particles [46,47].…”

Section: Photoluminescence Of Zno Nanostructuresmentioning

confidence: 99%

Template free large scale synthesis of multi-shaped ZnO nanostructures for optical, photocatalytical and antibacterial properties

Kadam

Dhabbe

Kokate

et al. 2015

J Mater Sci: Mater Electron

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In this article, ZnO nanostructures with diverse morphologies have been synthesized via a simple, rapid and cost effective solid state thermal decomposition method. The as-synthesized ZnO nanostructures were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy, scanning electron microscope (SEM), high-resolution transmission electron microscope (HR-TEM), UV-Vis. diffuse reflectance spectra (UV-Vis-DRS) and photoluminescence (PL). The XRD patterns and HR-TEM image indicated a hexagonal wurtzite structure of ZnO. The SEM images of ZnO samples show the different morphologies such as nanowire, nanorods, spherical and irregular microsphere at different calcination temperatures. Room temperature PL spectra of the samples exhibited characteristics blue and green emission bands in accordance with calcination temperature. Moreover, photocatalytic as well as antimicrobial activities were evaluated using ZnO synthesized at different calcination temperatures. The effects of calcination temperature, catalyst loading and pH on the photodegradation efficiency were systematically studied. A highest (99 %) photocatalytic activity of ZnO nanorods towards the Acid Green 25 (AG-25) was achieved within 35 min at optimal conditions under UV light. As-synthesized ZnO nanorods are found to be more efficient than TiO 2 (P25) towards the degradation of AG-25. It was found that the antimicrobial activity of ZnO nanorods (13 mm) obtained at 300°C showed significantly higher inhibition efficiencies than the other samples. The mineralization of AG-25 was confirmed from a reduction of 85 % the chemical oxygen demand within 35 min. In addition, ZnO nanorods could be easily reusable up to four runs without changing its photocatalytic activity.

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“…[39] Examples of oxidation and olefination were reported with ester and ketone as directing group but in both cases a mixture of C2-and C8-functionalized products were obtained (Scheme 21.b,c). [40,41] Despite one example of halogenations reported in 2013, [42] carbonyl-directed C8-functionalization is quite rare in the literature. In 2016, Xia and Fu's team developed a palladiumcatalyzed C8-triflation of naphthalenes (Scheme 22).…”

Section: -Carbonylnaphthalene Derivatives In C8-functionalizationmentioning

confidence: 99%

Regioselective C−H Functionalization of Naphthalenes: Reactivity and Mechanistic Insights

Prévost

2020

ChemPlusChem

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Naphthalene is a very important skeleton in chemistry as evidenced by the large number of active compounds that contain it. For this reason, methods that can achieve easy functionalization of naphthalene derivatives are of great importance. This Minireview summarizes reactions that allow regioselective functionalization of 1‐substituted naphthalenes based on directed C−H activation strategies. Indeed, over the past ten years, many research groups have tried to develop new methodologies to directly introduce different functional groups on every position of naphthalene. In addition to the possible reactions reported in the literature, special attention has been paid to mechanistic aspects in order to explain the observed regioselectivities.

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Total Synthesis of Indotertine A and Drimentines A, F, and G

Cited by 39 publications

References 78 publications

Bioinspired Total Synthesis of Sespenine

Bioinspired Total Synthesis of Sespenine

Template free large scale synthesis of multi-shaped ZnO nanostructures for optical, photocatalytical and antibacterial properties

Regioselective C−H Functionalization of Naphthalenes: Reactivity and Mechanistic Insights

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