41882-19-3Relevant articles and documents
Cobalt-catalyzed cyclization of 2-bromobenzamides with carbodiimides: A new route for the synthesis of 3-(imino)isoindolin-1-ones
Aman, Hasil,Chuang, Gary Jing,Hsieh, Jen-Chieh,Huang, Yu-Chiao,Kim, Min,Liu, Yu-Hao,Tsai, Yu-Lin
supporting information, (2021/12/09)
A novel synthetic pathway to approach 3-(imino)isoindolin-1-ones by the Co-catalyzed cyclization reaction of 2-bromobenzamides with carbodiimides has been developed. This catalytic reaction can tolerate a variety of substituents and provide corresponding products in moderate yields for most cases. According to the literature, the reaction mechanism is proposed through the formation of a five-membered aza-cobalacycle complex, which carries out the following reaction subsequence, including nucleophilic addition and substitution, to furnish the desired structures.
Palladium-Catalyzed Direct C-H Trifluoroethylation of Aromatic Amides
Maraswami, Manikantha,Pankajakshan, Sreekumar,Chen, Gang,Loh, Teck-Peng
supporting information, p. 4223 - 4226 (2017/08/23)
A simple and direct C-H trifluoroethylation of aromatic amides has been developed. The protocol is applicable to a variety of aromatic amides, including ones derived from amino acids. The developed method can be used for further modifications of peptides. Preliminary mechanistic studies have been done by isolating the reaction intermediate.
Quantitative insights into energy contributions of intermolecular interactions in fluorine and trifluoromethyl substituted isomeric N-phenylacetamides and N-methylbenzamides
Panini, Piyush,Chopra, Deepak
, p. 3711 - 3733 (2013/07/26)
The presence of the C-F bond in organic molecules, particularly in the context of generating different intermolecular interactions of the type C-F...F-C, C-H...F and C-F...π is of extreme significance in the realm of structural chemistry. These interactions generate different packing motifs in the formation of the crystal. It is of interest to evaluate the energetic contributions of such weak interactions to evaluate their important role in crystal packing. In this respect, a library of twelve compounds containing a strong donor and acceptor, along with the presence of a C-F bond in different electronic environments (fluorine atom connected to C(sp2) and C(sp3) carbon atom) have been synthesized and characterized using single crystal X-ray diffraction studies at low temperature. In addition, the non-fluorinated counterpart has also been synthesized. These crystal structures have been analyzed to understand the contribution of weak interactions involving organic fluorine in the crystal packing. Furthermore, the stabilizing-destabilizing roles of such interactions in terms of favourable energetics have been quantified with inputs from calculations performed using PIXEL. It is observed that most of the interactions involving fluorine are of a dispersive character, and in some cases the interaction is also coulombic in origin. These results have been compared with ab initio quantum-chemical calculations (DFT-D3/B-97D level) performed using TURBOMOLE. In addition, the lattice energies of all the compounds have been evaluated, and the total contribution partitioned into the corresponding coulombic, polarization, dispersion and exchange contributions using the CLP module. The results correlate well with thermochemical data experimentally determined for these compounds.
