二取代的苯并[ b ]呋喃是通过二氯苯酚和末端炔的邻位选择性Sonogashira偶联反应,然后使用钯-二羟基叔苯基膦(Cy-DHTP)催化剂在一个罐中进行环化和Suzuki-Miyaura偶联反应而合成的。亚化学计量的四丁基氯化铵的使用有效地加速了Suzuki-Miyaura偶联。该方案也成功地用于从二氯苯胺衍生物的一锅法合成二取代的吲哚。
Rhodium(III)-Catalyzed Oxidative Allylic C–H Indolylation via Nucleophilic Cyclization
作者:Jiaqiong Sun、Kuan Wang、Peiyuan Wang、Guangfan Zheng、Xingwei Li
DOI:10.1021/acs.orglett.9b01553
日期:2019.6.21
Reported herein is a mild synthesis of 3-allylindoles via Rh(III)-catalyzed allylic C–H activation of olefins and coupling with o-alkynylanilines. The reaction proceeded via initial nucleophilic cyclization of o-alkynylanilines followed by oxidative coupling with allylic C–H bonds via an η3-allyl intermediate.
A Robust, Well-Defined Homogeneous Silver(I) Catalyst for Mild Intramolecular Hydroamination of 2-Ethynylanilines Leading to Indoles
作者:James McNulty、Kunal Keskar
DOI:10.1002/ejoc.201301368
日期:2014.3
A highly efficient, chemically stable and well-definedhomogeneoussilver(I) catalyst is reported for the room temperature, intramolecularhydroamination of 2-alkynylanilines leading to indole derivatives.
Catalytic synthesis of indole-3-carboxamides from 2-ethynylanilines and isocyanates was achieved in the presence of a rhodium catalyst through a tandem-type, cyclization–addition sequence. This tandem-type process can be performed under mild reaction conditions, affording 2,3-disubstituted indoles in a one-pot manner generally in good to excellent yields. The broad substrate scope and good functional
An aerobic copper-mediateddominoreaction for the synthesis of 3-(trifluoromethylseleno)indoles by trifluoromethylselenolation of N-Ts 2-alkynylaniline with [(bpy)CuSeCF3]2 is reported. This reaction proceeds through sequential oxidation, alkyne coordination, and deprotonation followed by reductive elimination. This mild and robust method is highly functional group tolerant and provides straightforward
Rh(III)-Catalyzed Cascade Annulation/C–H Activation of <i>o</i>-Ethynylanilines with Diazo Compounds: One-Pot Synthesis of Benzo[<i>a</i>]carbazoles via 1,4-Rhodium Migration
作者:Songjin Guo、Kai Yuan、Meng Gu、Aijun Lin、Hequan Yao
DOI:10.1021/acs.orglett.6b02534
日期:2016.10.21
A Rh(III)-catalyzed cascade annulation/C–H activation of o-ethynylanilines with diazocompounds has been developed. This concise method allows for the rapid formation of a number of benzo[a]carbazoles in high yields, exhibiting good functional group tolerance and scalability. The key to the success of this approach involves one C–N bond and two C–C bond formation, and an aryl-to-aryl 1,4-rhodium migration
已开发了一种重氮化合物催化的Rh(III)催化邻乙炔基苯胺的级联环化/ CH活化。这种简洁的方法可以高产率快速形成许多苯并[ a ]咔唑,表现出良好的官能团耐受性和可扩展性。该方法成功的关键在于一个C–N键和两个C–C键的形成,以及芳基到芳基1,4-铑的迁移。