Redox-Neutral Photocatalytic C−H Carboxylation of Arenes and Styrenes with CO2
作者:Matthias Schmalzbauer、Thomas D. Svejstrup、Florian Fricke、Peter Brandt、Magnus J. Johansson、Giulia Bergonzini、Burkhard König
DOI:10.1016/j.chempr.2020.08.022
日期:2020.10
Carbondioxide (CO2) is an attractive one-carbon (C1) building block in terms of sustainability and abundance. However, its low reactivity limits applications in organic synthesis as typically high-energy reagents are required to drive transformations. Here, we present a redox-neutral C─H carboxylation of arenes and styrenes using a photocatalytic approach. Upon blue-light excitation, the anthrolate
Compounds of formula I or pharmaceutically acceptable salts thereof:
wherein R
1
, R
2
, R
3
, R
4
, n and A are as defined in the specification as well as salts and pharmaceutical compositions including the compounds are prepared. They are useful in therapy, in particular in the management of pain.
[EN] THERAPEUTIC COMPOUNDS: PYRIDINE AS SCAFFOLD<br/>[FR] COMPOSES THERAPEUTIQUES DANS LESQUELS LA PYRIDINE EST UTILISEE COMME SQUELETTE
申请人:ASTRAZENECA AB
公开号:WO2005115986A1
公开(公告)日:2005-12-08
Compounds of formulas I, IA, and IB or IC or pharmaceutically acceptable salts thereof: wherein A, A1, A2, A3, A4, R2, R3, R4 and n are as defined in the specifications well as salts and pharmaceutical compositions including the compounds are prepared. They are useful in therapy, in particular in the management of pain.