There is provided a novel and efficent method of synthesizing 7,10-dihydro-6,11-dihydroxy-5,9,12(8H)-naphthacenetrione and analogs thereof substituted in the 1,2,3 or 4 positions. The novel method comprises reacting the appropriate quinizarinquinone with a haloprene under Diels-Alder conditions, followed by aromatization and treatment with strong acid under very mild temperature conditions. The products of this process are important intermediates in the synthesis of daunomycin and its analogs which are useful in the therapy of neoplastic ailments.
提供了一种新颖和高效的方法来合成在1,2,3或4位取代的7,10-二氢-6,11-二羟基-5,9,12(8H)-
萘醌酮及其类似物。该新方法包括在Diels-Alder条件下将适当的喹噁啉醌与卤代
丙烯反应,随后在非常温和的温度条件下进行芳香化和强酸处理。该过程的产物是合成
多柔比星及其类似物的重要中间体,这些化合物对治疗肿瘤疾病有用。