620-40-6Relevant articles and documents
Helical structures of tribenzylamine supramolecular complexes with [CoCl4]2-/[CuCl4]2-, and conformational comparisons of tribenzylamine in different supramolecular complexes
Guan, Hong-Yu,Shao, Hui-De,Li, Lei,Jia, Jian-Ming,Guo, Fang
, p. 471 - 477 (2013)
The compound tribenzylamine (TBA) and its derivatives are a type of classical tripodal ligands in building up diversity of supramolecular arrays or networks. In the present contribution, we described two new supramolecular complexes 2[C21H22N+]·[CoCl 4]2-·(1) and 2[C21H22N +]·[CuCl4]2- (2) by reacting protonated TBA with CoCl2·6H2O/CuCl2·2H 2O. Different from previous TBA supramolecular complexes, these two supramolecular complexes were easier to obtain by grinding protonated TBA and CoCl2·6H2O/CuCl2·2H2O in an agate mortar than using conventional solution method. The two supramolecular complexes form fascinating 3D helical architectures, with two types of interwoven helical chains involved inside the structures. A comparison of the geometries of TBA in these two supramolecular complexes with the previously reported TBA supramolecular complexes shows that the significant differences are due to the conformation of the three arms of phenyl rings around the N center.
Layered structures constructed by second-sphere coordination via N-H···Cl and C-H···Cl hydrogen bonding: Synthesis and crystal structures of tribenzylamine and [MCl6] (M=Sn, Re, and Te)
Guo, Fang,Lu, Na,Tong, Jian,Luan, Yu-Bo,Guo, Wen-Sheng
, p. 809 - 818 (2010)
A series of second-sphere coordination complexes of tribenzylamine (L1) and [MCI6] (M=Sn, Re, Te) have been synthesized and characterized by spectroscopic techniques (IR, NMR) and single-crystal X-ray diffraction. The main driving force for the encapsulation of [MCl6] and recognition with L1 is the second-sphere coordination of metal halides by the amide protons of the ligand via hydrogen bonding (N-H···Cl-M and C-H···Cl-M); new layered structures are described. Thermal stability and irreversible behavior of second-sphere coordination complexes [L2] 0.5[TeCl6]2- · HCl · (H3O)+ · 0.5H2O (L2=N,N,N′,N′-tetrabenzyl-ethylenediamine) in contact with water vapor are also described.
Rapid Multialkylation of Aqueous Ammonia with Alcohols by Heterogeneous Iridium Catalyst under Simple Conditions
Yu, Han,Ma, Lin,Wada, Kenji,Kurihara, Ryohsuke,Feng, Qi,Uemura, Shinobu,Isoda, Kyosuke
, p. 3588 - 3593 (2021/07/02)
This paper reports the synthesis of tertiary and secondary amines from aqueous ammonia and benzylic alcohols by titania-supported iridium catalyst. It is a successful example of heterogeneous systems at moderate temperature without either additional solvent or high pressure. The catalytic system showed good tolerance to the atmosphere condition and performed rapidly to give tribenzylamine a yield of over 99 % within 6 hours in argon. The crystal structure of titania supports for iridium catalysts strongly affected their activity. The catalysis smoothly proceeded on larger scales. The catalyst could be easily reused and run at least for 5 cycles without significant loss of activity. The highly-dispersed iridium species of less than 2 nm in diameter would be responsible for the excellent catalytic activity. This catalyst is well applicable in multialkylation of aqueous ammonia with various primary and secondary benzylic alcohols.
BF3·Et2O as a metal-free catalyst for direct reductive amination of aldehydes with amines using formic acid as a reductant
Fan, Qing-Hua,Liu, Xintong,Luo, Zhenli,Pan, Yixiao,Xu, Lijin,Yang, Ji,Yao, Zhen,Zhang, Xin
supporting information, p. 5205 - 5211 (2021/07/29)
A versatile metal- and base-free direct reductive amination of aldehydes with amines using formic acid as a reductant under the catalysis of inexpensive BF3·Et2O has been developed. A wide range of primary and secondary amines and diversely substituted aldehydes are compatible with this transformation, allowing facile access to various secondary and tertiary amines in high yields with wide functional group tolerance. Moreover, the method is convenient for the late-stage functionalization of bioactive compounds and preparation of commercialized drug molecules and biologically relevant N-heterocycles. The procedure has the advantages of simple operation and workup and easy scale-up, and does not require dry conditions, an inert atmosphere or a water scavenger. Mechanistic studies reveal the involvement of imine activation by BF3and hydride transfer from formic acid.
