One-Pot Preparation of 9,10-Dihydrophenanthrenes Initiated by Rhodium(III)-Catalyzed C–H Activation and Relay Diels–Alder Reaction
作者:Dingding Gao、Xing-Yu Liu、Hao Xu、Yun-Xuan Tan、Qi Liao、Qing-Hua Li、Xiaodi Yang、Guo-Qiang Lin、Ping Tian
DOI:10.1021/acs.orglett.0c01339
日期:2020.6.5
An efficient one-pot synthesis of multisubstituted 9,10-dihydrophenanthrenes from easily available 2-arylazaarenes and cyclohexadienone-tethered terminal alkynes (1,6-enynes) has been successfully achieved. This domino reaction proceeded smoothly through Cp*Rh(III)-catalyzed C–H activation, direct protonation of alkenyl-Rh intermediates, intramolecular Diels–Alder reaction, alkene isomerization, subsequent
从容易获得的2-芳基氮杂芳烃和环己二酮系链的末端炔烃(1,6-炔烃)成功地实现了多取代9,10-二氢菲的高效一锅合成。该多米诺反应通过Cp * Rh(III)催化的C–H活化,烯基–Rh中间体的直接质子化,分子内Diels–Alder反应,烯烃异构化,随后的开环芳构化和乙酰化反应而顺利进行。这种策略非常经济,并且可以容忍各种各样的功能组。而且,对于这些人工的9,10-二氢菲衍生物,观察到了对HepG2细胞的有效抗癌活性。