Synthesis of Spiropyrans via Rh(III)-Catalyzed [3+3] Cyclization of 3-Aryl-2 H-1,4-benzoxazine and Diazonaphthalene-2 H-ones
Mengke Wen, Yiyue Li, Haokang Du, Zhangpei Chen, Xifa Yang
Chinese Journal of Organic Chemistry . 2024, (7): 2223 -2232 .  DOI: 10.6023/cjoc202403012