102292-89-7Relevant articles and documents
Asymmetric Catalytic Approach to Multilayer 3D Chirality
Wu, Guanzhao,Liu, Yangxue,Rouh, Hossein,Ma, Liulei,Tang, Yao,Zhang, Sai,Zhou, Peng,Wang, Jia-Ying,Jin, Shengzhou,Unruh, Daniel,Surowiec, Kazimierz,Ma, Yanzhang,Li, Guigen
supporting information, p. 8013 - 8020 (2021/05/10)
The first asymmetric catalytic approach to multilayer 3D chirality has been achieved by using Suzuki-Miyaura cross-couplings. New chiral catalysts were designed and screened under various catalytic systems that proved chiral amide-phosphines to be more efficient ligands than other candidates. The multilayer 3D framework was unambiguously determined by X-ray structural analysis showing a parallel pattern of three layers consisting of top, middle and bottom aromatic rings. The X-ray structure of a catalyst complex, dichloride complex of Pd-phosphine amide, was obtained revealing an interesting asymmetric environment nearby the Pd metal center. Three rings of multilayer 3D products can be readily changed by varying aromatic ring-anchored starting materials. The resulting multilayer products displayed strong luminescence under UV irradiation and strong aggregation-induced emission (AIE). In the future, this work would benefit not only the field of asymmetric synthesis but also materials science, in particular polarized organic electronics, optoelectronics and photovoltaics.
A new type of L-Tertiary leucine-derived ligand: Synthesis and application in Cu(II)-catalyzed asymmetric Henry reactions
Cai, Zedong,Lan, Ting,Ma, Pengfei,Zhang, Jingfang,Yang, Qingqing,He, Wei
, (2019/08/08)
A new series of Schiff bases derived from amino acids were developed as chiral ligands for Cu(II)-catalyzed asymmetric Henry reactions. The optimum ligand 7d exhibited outstanding catalytic efficiency in the Cu(II)-catalyzed asymmetric Henry additions of four nitroalkanes to different kinds of aldehydes to produce 76 desired adducts in high yields (up to 96%) with excellent enantioselectivities, up to 99% enantiomeric excess (ee).
Highly enantio- and diastereoselective synthesis of α- trifluoromethyldihydropyrans using a novel bifunctional piperazine-thiourea catalyst
Li, Peng,Chai, Zhuo,Zhao, Sheng-Li,Yang, Ying-Quan,Wang, Hai-Feng,Zheng, Chang-Wu,Cai, Yue-Peng,Zhao, Gang,Zhu, Shi-Zheng
supporting information; experimental part, p. 7369 - 7371 (2010/06/14)
The first enantioselective Michael addition of α-cyanoketones to α,β-unsaturated trifluoromethyl ketones using a novel piperazine-thiourea catalyst was described. The resulting α- trifluoromethyldihydropyrans were obtained in high yields and with up to 95
