Results 21 to 30 of about 105,811 (251)

Unconventional mechanism and selectivity of the Pd-catalyzed C–H bond lactonization in aromatic carboxylic acid

open access: yesNature Communications, 2022
Methods to functionalize inert C–H bonds are a critical focus of synthetic organic chemistry. In this work the authors use computations and experiments to uncover the mechanisms of palladium-catalysed C–H lactonizations in aromatic carboxylic acids, and ...
Li-Ping Xu   +4 more
doaj   +1 more source

Iridium-Catalyzed, β-Selective C(sp3)-H Silylation of Aliphatic Amines To Form Silapyrrolidines and 1,2-Amino Alcohols. [PDF]

open access: yes, 2018
The functionalization of unactivated C(sp3)-H bonds of aliphatic amines catalyzed by transition-metal complexes is important because amine-based functionality is present in a majority of biologically active molecules and commercial pharmaceuticals ...
Hartwig, John F, Lee, Taegyo, Su, Bo
core   +3 more sources

Distal Functionalization via Transition Metal Catalysis

open access: yesChemistry Proceedings, 2022
The ubiquitous presence of sp3 C−H bonds in natural feedstock makes them inexpensive, easily accessible, and attractive synthons for the preparation of common and/or complex molecular frameworks in biologically active natural products, pharmaceutics ...
Haibo Ge
doaj   +1 more source

Site-Selective C−H Arylation of Primary Aliphatic Amines Enabled by a Catalytic Transient Directing Group [PDF]

open access: yes, 2016
Transition-metal-catalysed direct C–H bond functionalization of aliphatic amines is of great importance in organic and medicinal chemistry research. Several methods have been developed for the direct sp3 C–H functionalization of secondary and tertiary ...
Ge, Haibo, Liu, Yongbing
core   +1 more source

Synthesis of Phthalides and α,β-butenolides by Transition Metal-Catalyzed Activation of C—H Bonds

open access: yesMolecules, 2019
Phthalides and α,β-butenolides are two related classes of oxygenated heterocycles with a wide range of biological activities. An innovative strategy to prepare these compounds is based on C—H bond functionalization reactions, in which two
Andrea Renzetti, Kozo Fukumoto
doaj   +1 more source

Cp∗Rh/Ag catalyzed C–H activation/cyclization sequences of NH-sulfoximines to fused aza-polyheterocycles under gentle conditions

open access: yesGreen Synthesis and Catalysis, 2023
Disclosed herein is a novel Rh/Ag co-catalyzed SNH directed C–H activation and C–H/N–H bond functionalization protocol of free NH-sulfoximines with hypervalent iodonium ylides.
Jiapian Huang   +4 more
doaj   +1 more source

Manganese(I)-Catalyzed C−H Activation : The Key Role of a 7-Membered Manganacycle in H-Transfer and Reductive Elimination [PDF]

open access: yes, 2016
Manganese-catalyzed C−H bond activation chemistry is emerging as a powerful and complementary method for molecular functionalization. A highly reactive seven-membered MnIintermediate is detected and characterized that is effective for H-transfer or ...
Ackermann   +32 more
core   +1 more source

Regioselective Access to Sultam Motifs through Cobalt-Catalyzed Annulation of Aryl Sulfonamides and Alkynes using an 8-Aminoquinoline Directing Group [PDF]

open access: yes, 2015
The use of cobalt as catalyst in direct C[BOND]H activation protocols as a replacement for more expensive second row transition metals is currently attracting significant attention.
Ackermann   +78 more
core   +1 more source

A first example of cobalt-catalyzed remote C-H functionalization of 8-aminoquinolines operating through a single electron transfer mechanism [PDF]

open access: yes, 2016
The development of new C[BOND]H functionalization protocols based on inexpensive cobalt catalysts is currently attracting significant interest. Functionalized 8-aminoquinoline compounds are high-potential building blocks in organic chemistry and ...
Ackermann   +49 more
core   +1 more source

Robust molecular trends in Pd-catalyzed C(sp2/sp3)-H activation reactions – A review

open access: yesResults in Chemistry, 2021
Direct functionalization of inert C–H bonds into various C-X (X = C, N, O, S) functionalities is one of the frontier research topics and regularly gaining popularities among the communities of scientists by providing opportunities for direct synthesis of
Pravati Panda   +2 more
doaj   +1 more source

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