A new InCl3-catalyzed reduction of anthrones and anthraquinones by using aluminum powder in aqueous media
作者:Chunyan Wang、Jieping Wan、Zhiguo Zheng、Yuanjiang Pan
DOI:10.1016/j.tet.2007.03.113
日期:2007.6
InCl3-catalyzed reduction of anthrones and anthraquinones was investigated under different conditions. A new synthetic method for anthracenes in aqueous media under mild conditions is described.
An efficient reduction of anthrones to anthracenes
作者:Donald J. Marquardt、Frankie A. McCormick
DOI:10.1016/0040-4039(94)88004-2
日期:1994.2
An efficient and general means of reducing anthrones to anthracenes has been developed. The procedure, which uses NaBH4 as the reducing agent in a mixed solvent system of diglyme/methanol, produced anthracenes in essentially quantitative yield from a variety of anthrones.
and the resulted bromoniumion collapses either by attack of the tribromide ion to produce the dibromide or by internal rotation about the C9–Callyl bond followed by attack of the tribromide ion to produce the bromoolefin. Examination of the bromoolefin/dibromide ratios at various temperatures suggests that the activation energy for the attack of the tribromide ion on the bromoniumion is ca. 3 kcal/mol
Practical synthesis of 9-substituted triptycene derivatives
作者:Liwei Zhao
DOI:10.1080/00397911.2021.1943444
日期:2021.9.2
Abstract A series of 9-position substituted triptycene derivatives were synthesized from 9-substituted anthracenes. Diels–Alder reaction was the key reaction to form the scaffold; both benzoquinon and aryne were studied as dienophile. The diastereomers of triptycene 10a were separated by chiral high-performance liquid chromatography (HPLC) column.
Restricted Rotation Involving the Tetrahedral Carbon. XV. Restricted Rotation about a C<sub>sp<sup>8</sup></sub>–C<sub>sp<sup>2</sup></sub>Bond in 9-Aryltriptycene Derivatives
作者:Mikio Nakamura、Michinori Oki
DOI:10.1246/bcsj.48.2106
日期:1975.7
A series of 9-aryltriptycene derivatives have been prepared and their internal rotation about the CAr–C9 bond has been examined by DNMR technique. The PMR behavior of these compounds is best interpreted by assuming a back and forth rotation rather than a full rotation. The barriers to rotation of compounds with one substituted benzo group have been found to be in the range 13–15 kcal/mol, whereas those