The Highly Enantioselective Addition of Indoles to <i>N</i>-Acyl Imines with Use of a Chiral Phosphoric Acid Catalyst
作者:Gerald B. Rowland、Emily B. Rowland、Yuxue Liang、Jason A. Perman、Jon C. Antilla
DOI:10.1021/ol0703579
日期:2007.7.1
The highlyenantioselective organocatalytic addition of N-benzyl indoles to N-acyl imines is reported. A total of 15 examples with product yield ranging from 89% to 99% and enantioselectivities from 90% to 97% are presented. A chiral phosphoric acid catalyst derived from a hindered binol derivative was employed most effectively in the reaction. Attractive features of the reaction include desirable
Pd-Catalyzed Direct and Selective CH Functionalization: C3-Acetoxylation of Indoles
作者:Qiang Liu、Gang Li、Hong Yi、Pan Wu、Jie Liu、Aiwen Lei
DOI:10.1002/chem.201002547
日期:2011.2.18
one! A novel Pd‐catalyzed direct and selectiveC3‐acetoxylation of indole derivatives has been accomplished (see scheme). This selective CH activation reaction was implemented without the assistance of directing groups and took place undermildconditions. The kinetic study revealed that the reaction was zero‐order with respect to the oxidant and first‐order with respect to the indole derivatives.
<i>N</i>-Hydroxyphthalimidyl diazoacetate (NHPI-DA): a modular methylene linchpin for the C–H alkylation of indoles
作者:Rajdip Chowdhury、Abraham Mendoza
DOI:10.1039/d1cc01026c
日期:——
The insertion of conventional diazocompounds into indoles are still limited by the custom carbene precursors, catalysts and manipulation of the products required. Herein, we address these shortcomings with a redox-active carbene precursor (NHPI-DA).
Acid-catalyzed acylation reaction via C–C bond cleavage: a facile and mechanistically defined approach to synthesize 3-acylindoles
作者:Qi Xing、Pan Li、Hui Lv、Rui Lang、Chungu Xia、Fuwei Li
DOI:10.1039/c4cc05047a
日期:——
A facile acid-catalyzed acylation of indoles with 1,3-dione as an eco-friendly acylating agent was developed. This protocol combines C-C bond cleavage and heterocyclic C-H bond functionalization to form new C-C bonds. Based on the detailed mechanistic studies, a credible mechanistic pathway was proposed.
Regiocontrolled Direct C−H Arylation of Indoles at the C4 and C5 Positions
作者:Youqing Yang、Pan Gao、Yue Zhao、Zhuangzhi Shi
DOI:10.1002/anie.201612599
日期:2017.3.27
An effective and practical strategy has been established for the direct and site‐selective arylation of indoles at the C4 and C5 positions with the aid of a readily accessible, cheap, and removable pivaloyl directing group at the C3 position. This transformation shows good functional‐group tolerance and could serve as a powerful synthetic tool for the synthesis of medicinally relevant compounds. This