Platinum-Catalyzed Friedel-Crafts-Type C−H Coupling-Allylic Amination Cascade to Synthesize 3,4-Fused Tricyclic Indoles
作者:Yuta Suzuki、Yuito Tanaka、Shun-ichi Nakano、Kosuke Dodo、Natsumi Yoda、Ken-ichi Shinohara、Kazuko Kita、Atsushi Kaneda、Mikiko Sodeoka、Yasumasa Hamada、Tetsuhiro Nemoto
DOI:10.1002/chem.201600375
日期:2016.3.18
A novel platinum‐catalyzed cascade cyclization reaction was developed by intramolecular Friedel–Crafts‐type C−H coupling of aniline derivatives with a propargyl carbonate unit‐allylic amination sequence. Treatment of various propargyl carbonates tethered to meta‐aniline derivatives with a Pt(dba)3/DPEphos catalyst system afforded the corresponding 3,4‐fused tricyclic 3‐alkylidene indolines in 42–99 %
通过苯胺衍生物的分子内Friedel-Crafts型CH偶联与炔丙基碳酸酯单烯丙基胺化序列,开发了一种新型的铂催化的级联环化反应。用Pt(dba)3 / DPEphos催化剂体系处理与间苯胺衍生物束缚的各种碳酸炔丙酯,得到相应的3,4-稠合的三环3-亚烷基二氢吲哚,产率为42-99%,转化为3,4-通过与三氟乙酸反应稠合吲哚衍生物。反应产物对癌细胞具有抗增殖活性,但对正常细胞不具有抗增殖活性,从而揭示了该反应对药物化学的潜在有用性。