Results 11 to 20 of about 9,246,440 (304)

A Transient Directing Group Strategy Enables Enantioselective Multicomponent Organofluorine Synthesis. [PDF]

open access: yesJ Am Chem Soc, 2021
The vicinal fluorofunctionalization of alkenes represents an expedient strategy for converting feedstock olefins into valuable fluorinated molecules and as such has garnered significant attention from the synthetic community; however, current methods ...
Liu Z   +6 more
europepmc   +4 more sources

Copper-mediated oxidative C−H/N−H activations with alkynes by removable hydrazides

open access: yesBeilstein Journal of Organic Chemistry, 2021
The efficient copper-mediated oxidative C–H alkynylation of benzhydrazides was accomplished with terminal alkynes. Thus, a heteroaromatic removable N-2-pyridylhydrazide allowed for domino C–H/N–H functionalization.
Feng Xiong   +7 more
doaj   +1 more source

Synthesis of Polysubstituted Ferrocenesulfoxides

open access: yesMolecules, 2022
The purpose of the study is to design synthetic methodologies, especially directed deprotometalation using polar organometallic reagents, to access polysubstituted ferrocenesulfoxides.
Min Wen   +6 more
doaj   +1 more source

Set-direct factorizations of groups [PDF]

open access: yesJournal of Algebra, 2018
referee comments included, 19 ...
Levy, Dan, Maróti, Attila
openaire   +2 more sources

Catalyst design in C-H activation: a case study in the use of binding free energies to rationalise intramolecular directing group selectivity in iridium catalysis. [PDF]

open access: yesChem Sci, 2021
Remote directing groups in a bifunctional molecule do not always behave independently of one another in C–H activation chemistries. A combined DFT and experimental mechanistic study to provide enhanced Ir catalysts for chemoselective C–H deuteration of ...
Kerr WJ, Knox GJ, Reid M, Tuttle T.
europepmc   +4 more sources

Grouping with Directed Relationships [PDF]

open access: yes, 2001
Grouping is a global partitioning process that integrates local cues distributed over the entire image. We identify four types of pairwise relationships, attraction and repulsion, each of which can be symmetric or asymmetric. We represent these relationships with two directed graphs.
Stella X. Yu, Jianbo Shi
openaire   +1 more source

Imine as a linchpin approach for meta-C–H functionalization

open access: yesNature Communications, 2021
Site-selective C–H functionalization still faces some challenges, such as the introduction and removal of an appropriate directing group. Here, the authors introduce a temporary directing group for selective meta-C–H functionalization of 2 ...
Sukdev Bag   +6 more
doaj   +1 more source

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

Tuning Reactivity in Pd-Catalysed C(sp3)-H Arylations via Directing Group Modifications and Solvent Selection [PDF]

open access: yes, 2020
The palladium-catalysed sp3 C-H arylation of a selection of saturated amine scaffolds was investigated using substituted picolinamide directing groups.
Abil, Aliev   +4 more
core   +2 more sources

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