Late-Stage <i>N</i>-Me Selective Arylation of Trialkylamines Enabled by Ni/Photoredox Dual Catalysis
作者:Yangyang Shen、Tomislav Rovis
DOI:10.1021/jacs.1c08157
日期:2021.10.13
The diversity and wide availability of trialkylamines render them ideal sources for rapid construction of complex amine architectures. Herein, we report that a nickel/photoredox dual catalysis strategy affects site-selective α-arylation of various trialkylamines. Our catalytic system shows exclusive N-Me selectivity with a wide range of trialkylamines under mild conditions, even in the context of late-stage
OXADIAZOLE SUBSTITUTED INDAZOLE DERIVATIVES FOR USE AS SPHINGOSINE 1-PHOSPHATE 1 (S1P1) RECEPTOR AGONISTS
申请人:Bailey James
公开号:US20120283297A1
公开(公告)日:2012-11-08
Oxadiazole substituted indazole derivatives of formula (I) or pharmaceutical salts thereof having pharmacological activity, processes for their preparation, pharmaceutical compositions containing them and their uses in the treatment of various disorders mediated by S1P1 receptors are disclosed.
Selective N1-Acylation of Indazoles with Acid Anhydrides Using an Electrochemical Approach
作者:D. M. M. Mevan Dissanayake、Aaron K. Vannucci
DOI:10.1021/acs.orglett.8b03683
日期:2019.1.18
An electrochemical synthesis method for the selective N1-acylation of indazoles has been developed. This “anion pool” approach electrochemically reduces indazole molecules generating indazole anions and H2. Acidanhydrides are then introduced to the solution resulting in selective acylation of the N1-position of the indazoles. This procedure can also be applied to the acylation of benzimidazoles and indoles
Protected Indazole Boronic Acid Pinacolyl Esters: Facile Syntheses and Studies of Reactivities in Suzuki-Miyaura Cross-Coupling and Hydroxydeboronation Reactions
and efficient synthesis for the isolation of protected indazolylboronic esters. These com- pounds were synthesized by reaction between prepared protected haloindazoles and bis(pinacolato)diboron. The effects of solvent, temperature, reaction time, and the nature of halogen atom as well as protecting group were investigated. Additionaly, these com- pounds reacted either with arylhalides in a Suzuki-Miyaura
The paper describes the Suzuki cross-coupling of a variety of N and C-3 substituted 5-bromoindazoles with N-Boc-2-pyrrole and 2-thiopheneboronic acids. The reactions, performed in the presence of K2CO3, dimethoxyethane and Pd(dppf)Cl2 as catalyst, gave the corresponding adducts in good yields. The methodology allows the facile production of indazole-based heteroaryl compounds, a unique architectural motif that is ubiquitous in biologically active molecules.