- Synthesis of 8-methyl[2.2]metacyclophanes and their charge-transfer complexes with tetracyanoethylene
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The regioselective 1:1 charge-transfer band of 13-substituted 8-methyl[2.2]metacyclophanes with tetracyanoethylene in CH2Cl 2, attributable to the 8-methyl substituted benzene-site complex, are observed in the field of 556-605 nm, which is strongly affected by π-electron density of the opposite aromatic ring.
- Shimizu, Tomoe,Hita, Katsuhiro,Rahman, Shofiur,Yamato, Takehiko
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experimental part
p. 293 - 297
(2009/12/07)
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- Synthesis of polymethyl substituted [2.2]metaparacyclophanes and their Lewis-acid induced isomerisation to [2.2]metacyclophanes
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The preparation of polymethyl substituted [2.2]metaparacyclophanes using sulfur method and the X-ray structure determination of 4,5,6,8,12,13,15,16- octamethyl[2.2]metaparacyclophane are described. AlCl3-MeNO 2-catalysed trans-tert-b
- Shimizu, Tomoe,Hita, Katsuhiro,Paudel, Arjun,Tanaka, Junnji,Yamato, Takehiko
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experimental part
p. 244 - 247
(2009/12/25)
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- OXIDATION OF HEXAMETHYLBENZENE AND 2,3,4,5,6-PENTAMETHYLBENZYL CATION IN FLUOROSULFONIC ACID
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The oxidation of hexamethylbenzene in HSO3F-PbO2 takes place with the participation of the 1-H+-1,2,3,4,5,6-hexamethylbenzenonium ion and the intermediate formation of the 2,3,4,5,6-pentamethylbenzyl cation, which is capable of entering into further oxidative transformations leading to substitution of the hydrogen atom in two and three methyl groups.The structure of the final products from the observed transformations were established, and a mechanism is proposed for their formation.
- Rudenko, A. P.,Zarubin, M. Ya.,Fedorova, E. M.
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p. 1609 - 1618
(2007/10/02)
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