Autoxidation of Guaiazulene and 4,6,8-Trimethylazulene in Polar Aprotic Solvent: Structural Proof for Products
作者:Yoshiharu Matsubara、Shin-ichi Takekuma、Katsumi Yokoi、Hiroshi Yamamoto、Tetsuo Nozoe
DOI:10.1246/bcsj.60.1415
日期:1987.4
Autoxidation of guaiazulene and 4,6,8-trimethylazulene at 100–120°C in DMF (or HMPA) respectively yielded 25 and 17 separable products, including several known compounds. Most of these new compounds were derivatives of 1,5- and 1,7-azulenequinone, 1H-inden-1-one, naphthoquinone, and benzenoid, or dimeric and trimeric forms; structures of these products were established on the basis of spectroscopic (NMR, UV, IR, and MS) and half-wave potential (E1⁄2) data. 1H NMR (200-MHz) parameters of various azulene derivatives are given for comparative study. Possible reaction pathways are suggested for the formation of such a wide variety of interesting products.
在DMF(或HMPA)中,分别在100-120°C下对瓜烷和4,6,8-三甲基烷进行自动氧化,分别产生了25和17个可分离的产品,其中包括几种已知化合物。大多数这些新化合物是1,5-和1,7-烷醌、1H-茚-1-酮、萘醌、苯型化合物或二聚体和三聚体形式的衍生物;这些产品的结构是基于光谱(NMR、UV、IR和MS)和半波电位(E1/2)数据确定的。给出了各种烷衍生物的1H NMR(200 MHz)参数,用于比较研究。为形成如此多样化的有趣产品,提出了可能的反应途径。