Theoretical study of C-arylations with aryl halides to determine the reaction mechanism, the effect of substituents and heteroatoms
文献信息
发布日期
2019-04-29
DOI
10.1039/C8CP07752E
影响因子
3.676
作者
Rocío Durán, Barbara Herrera
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摘要
Carbon arylations are very important in the pharmaceutical industry. New synthesis routes are often studied with the objective of trying to insert new bonds and substituents into an organic framework. Ullman reactions have been very useful in this context. In light of this, a wB97XD/6-311g set of Ullman-like reactions among substituted amide arylations with iodoaniline were theoretically studied in order to understand their intrinsic reactivity and their reaction mechanisms. The studied systems included unsubstituted (C), sulphur (S), synthesized by the authors in a previous experimental work. In this study, amino (NH) and butyloxycarbonyl (NBoc) amides were added. IRC calculations on catalyzed species showed that the catalyst lowers the reaction barrier, and changes the reactivity in order to lower the nitrogen charge. The reaction mechanism proceeds by binding the CuI catalyst and N,N-dimethylethylenediamine (DMEN) to the N lactam, in a barrierless reaction, thereby activating the nitrogen to bond with the aryl iodine through a nucleophilic substitution, and thus recovering the catalyst.
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来源期刊
Physical Chemistry Chemical Physics
CiteScore:
5.5
自引率:
10.3%
年发文量:
3036
Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
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