Double CH Functionalization in Sequential Order: Direct Synthesis of Polycyclic Compounds by a Palladium-Catalyzed CH Alkenylation-Arylation Cascade
作者:Hiroaki Ohno、Mutsumi Iuchi、Naoto Kojima、Takehiko Yoshimitsu、Nobutaka Fujii、Tetsuaki Tanaka
DOI:10.1002/chem.201103819
日期:2012.4.23
Palladium‐catalyzed cascade CH alkenylation and arylation provides convenient access to polycyclic aromatic compounds. Treatment of 3‐bromoaniline derivatives bearing a bromocinnamyl group on the nitrogen atom with a catalytic amount of [Pd(OAc)2] and PCy3⋅HBF4 in the presence of Cs2CO3 in dioxane affords naphthalene‐fused indole derivatives in good yields. This double cyclization reaction is also
钯催化的级联CH烯基化和芳基化提供了多环芳族化合物的便捷通道。3-溴苯胺衍生物支承在氮原子上的bromocinnamyl组[将Pd(OAc)催化量的治疗2 ]和PCY 3 ⋅HBF 4中Cs的存在2 CO 3在良好的二恶烷,得到萘稠合的吲哚衍生物产量。该双环化反应也适用于杂环底物,通过杂环C产生含杂芳环的稠合吲哚,如二苯并呋喃,二苯并噻吩,咔唑,吲哚或苯并呋喃。盐基化。当使用2,6-未取代的苯胺衍生物时,首个CH芳基化反应优先在苯胺环的受阻位置进行。