Oxidation of 4,6,8-Trimethylazulene and Guaiazulene with Hydrogen Peroxide in Pyridine
作者:Yoshiharu Matsubara、Masanori Morita、Shin-ichi Takekuma、Tomohiro Nakano、Hiroshi Yamamoto、Tetsuo Nozoe
DOI:10.1246/bcsj.64.3497
日期:1991.11
Oxidation of 4,6,8-trimethylazulene (1) with hydrogen peroxide in pyridine at 25°C for 18 h gave 4,6,8-trimethyl-1,5- and -1,7-azulenequinones, their 2-(4,6,8-trimethyl-1-azulenyl) derivatives, and 2,3-dihydro-4,6- and -4,7-dimethyl-2-(4,6,8-trimethyl-1-azulenyl)-1H-inden-1-ones in much higher yields than those by autoxidation of 1 in DMF at 120°C. The same oxidation of guaiazulene afforded sixteen separable products, among which there were three new dimeric condensates.
4,6,8-三甲基甘菊环 (1) 在吡啶中于 25°C 下用过氧化氢氧化 18 小时,得到 4,6,8-三甲基-1,5-和-1,7-甘菊醌,它们的 2-(4 ,6,8-三甲基-1-薁基)衍生物和2,3-二氢-4,6-和-4,7-二甲基-2-(4,6,8-三甲基-1-薁基)-1H-茚-1-酮的产率比 1 在 DMF 中 120°C 下自动氧化的产率高得多。愈创蓝油烯的相同氧化提供了十六种可分离的产物,其中有三种新的二聚缩合物。