Herstellung von Anthrachinonderivaten aus dem DIELS-ALDER-Addukt von 1,4-Naphtochinon und 5,5-Dimethoxy-1,2,3,4-tetrachlorcyclopentadien. 2. Mitteilung
作者:P. Kniel
DOI:10.1002/hlca.19650480421
日期:——
The DIELS-ALDER adduct of 1,4-naphthoquinone and 5,5-dimethoxy-1,2,3,4-tetrachlorocyclopentadiene was transformed into the di-O-acetyl-dienol (80%) which, on oxidation with chromium trioxide, gave 2,3,4-trichloranthraquinone-1-carboxylic acid methylester (72%). Sodium dithionite treatment of this compound yielded 2,3-dichloroanthraquinone-1-carboxylic acid (80%). Pyrolysis of the DIELS-ALDER adduct
将1,4-萘醌和5,5-二甲氧基-1,2,3,4-四氯环戊二烯的DIELS-ALDER加合物转化为二-O-乙酰基-二烯醇(80%),经三氧化铬氧化后,得到2,3,4-三氯蒽醌-1-羧酸甲酯(72%)。该化合物的连二亚硫酸钠处理得到2,3-二氯蒽醌-1-羧酸(80%)。DIELS-ALDER加合物和二乙酰二烯酚的热解,然后氧化,生成2,3,4-三氯蒽醌-1-羧酸甲酯(9,5%)和1,2,3,4-四氯蒽醌(29%) , 分别。