1322804-32-9Relevant academic research and scientific papers
Direct catalytic asymmetric mannich-type reaction of benzyl isocyanide: Stereoselective synthesis of 1,2-diarylethylenediamines
Tamura, Keiji,Kumagai, Naoya,Shibasaki, Masakatsu
, p. 3026 - 3031 (2015)
A direct catalytic asymmetric Mannich-type reaction of benzyl isocyanide using a CuI catalyst and N-(diphenylthiophosphinoyl)imines was developed. The simultaneous activation strategy by soft-soft interaction was the key to promote the reaction using a weakly acidic pronucleophile, benzyl isocyanide. The spontaneous cyclization of the Mannich adduct afforded the corresponding enantioenriched imidazolines, which could be precursors for a variety of 1,2-diarylethylenediamines. Enantioenriched 4,5-diarylimidazolines were directly accessed by catalytic asymmetric C-C bond-forming reaction of benzyl isocyanide and N-(thiophosphinoyl)aldimines. The imidazolines were readily transformed into enantioenriched 1,2-diarylethylenediamines.
Controlling Metallophilic Interactions in Chiral Gold(I) Double Salts towards Excitation Wavelength-Tunable Circularly Polarized Luminescence
Chang, Xiaoyong,Che, Chi-Ming,Chen, Yong,Chi, Weijie,Li, Kai,Li, Ming-De,Liu, Xiaogang,Lu, Wei,Sun, Shanshan,To, Wai-Pong,Wang, Chao,Wang, Jian,Yang, Jian-Gong,Zhang, Hong-Xing,Zou, Chao
, p. 6915 - 6922 (2020)
Materials exhibiting excitation wavelength-dependent photoluminescence (Ex-De PL) in the visible region have potential applications in bioimaging, optoelectronics and anti-counterfeiting. Two multifunctional, chiral [Au(NHC)2][Au(CN)2] (NHC=(4R,5R)/(4S,5S)-1,3-dimethyl-4,5-diphenyl-4,5-dihydro-imidazolin-2-ylidene) complex double salts display Ex-De circularly polarized luminescence (CPL) in doped polymer films and in ground powder. Emission maxima can be dynamically tuned from 440 to 530 nm by changing the excitation wavelength. The continuously tunable photoluminescence is proposed to originate from multiple emissive excited states as a result of the existence of varied AuI???AuI distances in ground state. The steric properties of the NHC ligand are crucial to the tuning of AuI???AuI distances. An anti-counterfeiting application using these two salts is demonstrated.
