通过Rh(III)催化2-芳基吲哚和4-羟基-吲哚的级联C-H活化/环化/内酯化反应,可以高效,区域选择性地合成稠合的多环呋喃并[3,4- c ]吲哚并[ 2,1- a ]异喹啉。已经开发了2-链烷酸酯。该级联反应显示出高的步骤经济性和效率,并且可以耐受各种官能团。标题为多环呋喃并[3,4- c ]吲哚并[2,1- a ]异喹啉表现出荧光发射。
Palladium-Catalyzed Direct C-2 Arylation of Indoles with Aryl Halides in Aqueous Medium
作者:Chun Cai、Guo-ping Lu
DOI:10.1055/s-0032-1317702
日期:——
A newly developed, efficient catalytic system for direct C2-arylation of indoles with aryl halides in aqueous medium under mild conditions (80 °C) is reported. These procedures are free of toxic solvents, and exhibit improved yields and high chemo- and regioselectivity.
Palladium‐Catalyzed C2−H Arylation of Unprotected (N−H)‐Indoles “On Water” Using Primary Diamantyl Phosphine Oxides as a Class of Primary Phosphine Oxide Ligands
作者:Oana Moncea、Didier Poinsot、Andrey A. Fokin、Peter R. Schreiner、Jean‐Cyrille Hierso
DOI:10.1002/cctc.201800187
日期:2018.7.9
We present the Pd‐catalyzedarylation of (N−H)‐indoles with functionalized haloarenes “on water” using hitherto untested primary diamantyl phosphine oxides (PPO) as ligands. Remarkable C2−H arylation selectivity was achieved by employing functionalized iodoarenes and N‐unprotected indoles. We provide evidence that the in situ generated oxide of (9‐hydroxydiamant‐4‐yl)phosphine L1 is key for the reaction
Nitro-Enabled Atroposelective Dynamic Kinetic Resolution of 2-Arylindoles by Phase-Transfer Catalysis
作者:Chanhee Lee、Sujin Lee、Ahreum Kim、Yongseok Kwon
DOI:10.1021/acs.orglett.3c03933
日期:2024.1.26
This study presents the atroposelective alkylation of 2-arylindoles catalyzed by a substituted cinchonium salt as a phase-transfer catalyst. Under the optimized reaction conditions, various substrates are employed to yield products with high enantioselectivity. The presence of an ortho-nitro group at the aromatic ring is essential for high atroposelectivity, because it facilitates favorable interactions