with indolyl β-ketonitrile/ester in a cascade manner is demonstrated. The reaction sequence involves benzyne-mediated [2 + 2] Stoltz-type cycloaddition–cleavage and intramolecular Michael addition followed by C–N bond cleavage under transition-metal-free reaction conditions. Interestingly, while [4 + 2] Diels–Alder reaction is a possible pathway, no traces of the regioisomer was isolated.
通过与
吲哚基β-酮腈/酯级联的
芳烃环合,意外地合成了N-取代的2-
氨基-2'-羟基-1,1'-联芳基。在无过渡
金属的反应条件下,反应顺序包括苯并[2 + 2] Stoltz型环加成裂解和分子内迈克尔加成,然后进行C–N键裂解。有趣的是,虽然[4 + 2] Diels–Alder反应是可能的途径,但没有分离出区域异构体的痕迹。