HNO₃ was demonstrated to be an effective catalyst for aerobic oxidation of benzylic sp³ CH bonds under additive-free conditions. A series of isochromans, xanthenes and fluorenes underwent this transformation to give the targeted products in low to high yields under the catalysis of HNO₃, which provided an effective method for the synthesis of the synthetically and biologically valued isochromanones, xanthones and 9-fluorenones.

中文翻译：

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在无添加剂条件下硝酸催化异色满，黄嘌呤和9-芴酮的苄基sp ³ C H键的好氧氧化

HNO ₃被证明是在无添加剂条件下有效氧化苄基sp ³ C H键的有效催化剂。在HNO ₃的催化下，一系列异铬烷，黄嘌呤和芴经历了这种转化，以低到高收率得到了目标产物，这为合成和生物学上有价值的异铬烷酮，黄嘌呤和9-芴酮的合成提供了一种有效的方法。