Formal [4 + 4] cycloaddition of 3-arylcyclobutanones with anthracene and their acid-promoted intramolecular cyclization with skeletal rearrangement
作者:Mayu Kanie、Yuya Ikawa、Tomoyuki Yoshimura、Jun-ichi Matsuo
DOI:10.1016/j.tetlet.2019.07.001
日期:2019.8
A reaction of 3-arylcyclobutanones with anthracene in the presence of TiCl4 gave 14-aryl-9,10-dihydro-9,10-butanoanthracen-12-ones as a formal [4 + 4] cycloadduct of anthracenes with a C4 unit formed by cleaving the more substituted C2C3 bond of cyclobutanones. On the other hand, activation of 3-arylcyclobutanones with TfOH in the absence of nucleophiles gave 2-tetralones with skeletal rearrangement
3-TiCl 4存在下3-芳基环丁酮与蒽的反应生成了14-芳基-9,10-二氢-9,10-丁酮蒽-12-作为蒽的正式[4 + 4]环加合物,形成了C4单元通过裂解环丁酮的更取代的C2 C3键。另一方面,在不存在亲核试剂的情况下,用TfOH活化3-芳基环丁酮会产生具有骨架重排的2-tetralones。