The Photochemical Cyclodehydrogenation Route to Polycyclic Azaarenes
作者:Michael Hewlins、Rhys Salter
DOI:10.1055/s-2007-983745
日期:——
paper reports an investigation of photochemical cyclodehydrogenation for the preparation of polycyclic azaarenes. Various naphthoquinolines and naphthoisoquinolines were obtained from 2-, 3-, and 4-[2-(1- and 2-naphthyl)vinyl]pyridine. 4-[2-(3-Phenanthryl)vinyl]pyridine gave pyreno[1,10- HIJ]isoquinoline. An efficient preparation of (2-arylvinyl)pyridines is described.
[2 + 2] Photodimerization of Naphthylvinylpyridines through Cation-π Interactions in Acidic Solution
作者:Shinji Yamada、Yuka Nojiri
DOI:10.3390/molecules22030491
日期:——
high-pressure mercury lamp in acidic solution afforded synHT dimers in high stereoselectivities. Similar results were obtained by visible light irradiation. On the other hand, when the reactions were carried out under neutral conditions, the stereoselectivities were very low, and the yields were decreased by visible light irradiation. Comparison of the UV-vis spectra between the acidic and the neutral conditions
A chemo- and stereoselective Pd-catalysed semi-reduction of alkynes to (Z)-alkenes has been performed in a phosphonium-based DES by using the in situ generation of H2 from Al/H2O. The antitumor agent combretastatin A4 has been also synthesized.
通过利用 Al/H2O 原位生成 H2,在膦基 DES 中进行了炔烃到 (Z)- 烯的化学和立体选择性钯催化半还原反应。此外,还合成了抗肿瘤药物考布他丁 A4。
Spalletti, Anna; Mazzucato, Ugo; Aloisi, Gian Gaetano, Zeitschrift für Physikalische Chemie, 1983, vol. 138, p. 199 - 206
作者:Spalletti, Anna、Mazzucato, Ugo、Aloisi, Gian Gaetano、Pannacci, Danilo
DOI:——
日期:——
Effect of the nitrogen heteroatom on the photophysics and photochemistry of <i>trans</i>
-1-styrylnaphthalene and <i>trans</i>
-9-styrylphenanthrene in different solvents
The effect of the nitrogenheteroatom on the excited state properties of trans-1-styryl-naphthalene (1-StN) and trans-9-styrylphenanthrene (9-StPh) has been investigated by fluorimetric and photochemical techniques. The relaxation processes of two aza analogues of each of these diarylethylenes, bearing the nitrogen atom in the mono- and polycyclic aryl group, respectively, were studied in different