766-84-7Relevant articles and documents
Copper-promoted cyanation of aryl iodides with N,N-dimethyl aminomalononitrile
Liu, Si-Zhan,Li, Jing,Xue, Cao-Gen,Xu, Xue-Tao,Lei, Lin-Sheng,Huo, Chen-Yu,Wang, Zhen,Wang, Shao-Hua
supporting information, (2021/02/01)
A copper-promoted cyanation of aryl iodides has been successfully developed by using N,N-dimethyl aminomalononitrile as the cyanide source with moderate toxicity and better stability. This reaction features broad substrate scope, excellent reaction yields, readily available catalyst, and simple reaction conditions.
Unprecedented Catalysis of Cs+Single Sites Confined in y Zeolite Pores for Selective Csp3-H Bond Ammoxidation: Transformation of Inactive Cs+Ions with a Noble Gas Electronic Structure to Active Cs+Single Sites
Acharyya, Shankha S.,Ghosh, Shilpi,Iwasawa, Yasuhiro,Kaneko, Takuma,Sasaki, Takehiko,Yoshida, Yusuke
, p. 6698 - 6708 (2021/06/25)
We report the transformation of Cs+ ions with an inactive noble gas electronic structure to active Cs+ single sites chemically confined in Y zeolite pores (Cs+/Y), which provides an unprecedented catalysis for oxidative cyanation (ammoxidation) of Csp3-H bonds with O2 and NH3, although in general, alkali and alkaline earth metal ions without a moderate redox property cannot activate Csp3-H bonds. The Cs+/Y catalyst was proved to be highly efficient in the synthesis of aromatic nitriles with yields >90% in the selective ammoxidation of toluene and its derivatives as test reactions. The mechanisms for the genesis of active Cs+ single sites and the ammoxidation pathway of Csp3-H bonds were rationalized by density functional theory (DFT) simulations. The chemical confinement of large-sized Cs+ ions with the pore architecture of a Y zeolite supercage rendered the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap reduction, HOMO component change, and preferable coordination arrangement for the selective reaction promotion, which provides a trimolecular assembly platform to enable the coordination-promoted concerted ammoxidation pathway working closely on each Cs+ single site. The new reaction pathway without involvement of O2-dissociated O atom and lattice oxygen differs from the traditional redox catalysis mechanisms for the selective ammoxidation.
An overview on the progress and development on the palladium catalyzed direct cyanation
Heydari, Somayyeh,Habibi, Davood,Reza Faraji, Ali,keypour, Hassan,Mahmoudabadi, Masoumeh
, (2020/10/02)
Generation of the positive CN ion and the corresponding direct cyanation are both extremely important for cyanation of aromatic compounds. Hereby, we would like to report the simultaneous use of the new Pd nano-catalyst as well as the three types of the N-arylsulfonyl cyanamides (A, B and C) as potent reagents for the in situ generation of the positive CN ion for the direct cyanation of phenylboronic acids in acetonitrile at reflux conditions.