The Synthesis of the Chloro and Dichloro Derivatives of 2,10-Dihydroxydicyclohepta[<i>b</i>,<i>d</i>]furan-3,9-diones
作者:Tomoyuki Kusaba、Akira Mori、Hitoshi Takeshita
DOI:10.1246/bcsj.58.515
日期:1985.2
4,8-Dichloro- and 5,7-dichloro-2,10-dihydroxydicyclohepta[b,d]furan-3,9-diones were synthesized. Although the latter could be obtained by condensation of 4-chloro-p-tropoquinone and its hydroquinone, the former required the hydrolysis of condensate of 3-chloro-p-tropoquinone and 7-chloro-5-hydroxy-2-methoxytropone. This mixed condensation led to several unsymmetrically substituted derivatives in improved yields.
The Cerium(IV) Ammonium Nitrate Oxidation of 5-Hydroxy-2-methoxytropone to Bitropolonyl Derivatives and One-Step Synthesis of 3-Methoxy-<i>p</i>-tropoquinone
作者:Akira Mori、Yasutoshi Isayama、Hitoshi Takeshita
DOI:10.1246/bcsj.59.511
日期:1986.2
benzenoid equivalent, p-methoxyphenol, the cerium(IV) ammonium nitrate (CAN)-oxidation of 5-hydroxy-2-methoxytropone gave C–C coupling products. On the other hand, either by thallium(III) nitrate (TTN) or CAN at 50 °C, 5-hydroxytropolone, a free tropolone, gave 3-methoxy-p-tropoquinone together with p-tropoquinone and 8-oxabicyclo[3.2.1]octenone derivatives, but no dimeric product.
与苯类等价物对甲氧基苯酚不同,硝酸铈 (IV) 铵 (CAN) 氧化 5-羟基-2-甲氧托酮产生 C-C 偶联产物。另一方面,通过硝酸铊 (III) (TTN) 或 CAN 在 50 °C 下,5-羟基托酚酮,一种游离的托酚酮,与对托苯醌和 8-氧杂双环酮一起得到 3-甲氧基-对-托苯醌[3.2。 1]辛烯酮衍生物,但没有二聚产物。