Intramolecular Migration of Bulky Substituents in the Solid State: Vinylogous Pinacol Rearrangements Induced Thermally and by Acid Catalysis
作者:Ryo Sekiya、Kazuhiko Kiyo-oka、Tatsuro Imakubo、Keiji Kobayashi
DOI:10.1021/ja000788l
日期:2000.10.1
and 8 formed a mixed crystal and its thermally induced reaction yielded two anthrone products that were attributable to intramolecular migration but afforded no anthrone derivative having the two substituents possible for the intermolecular combination. These results, along with the X-ray crystal structure of the mixed crystal, demonstrate that the rearrangement in the solid state proceeds intramolecularly
对于噻吩并噻吩取代的 9,10-二羟基-9,10-二氢蒽,在固态下热诱导了一种乙烯基频哪醇重排,涉及庞大的噻吩并噻吩基取代基的分子内 1,4-迁移和晶体结构的显着变化, 1 和 3∼8。当加热超过 180 至 240 °C 时,这些晶体随着脱水而定量转化为蒽酮衍生物晶体,而不会润湿或熔化。带有两个异构噻吩并噻吩环的二醇 8 仅提供单一的蒽酮产物。化合物1和8形成混晶,其热诱导反应产生两种蒽酮产物,其可归因于分子内迁移,但不提供具有可能用于分子间组合的两个取代基的蒽酮衍生物。这些结果,与混晶的 X 射线晶体结构一起,证明固态重排在分子内进行。1,4-频哪醇型重排是...