126522-56-3Relevant academic research and scientific papers
A powerful Bronsted acid catalyst for the organocatalytic asymmetric transfer hydrogenation of imines
Hoffmann, Sebastian,Seayad, Abdul Majeed,List, Benjamin
, p. 7424 - 7427 (2005)
(Chemical Equation Presented) A little goes a long way: A 1 mol % loading of the chiral phosphoric acid catalyst 2 converts aromatic and aliphatic imines such as 1 into the corresponding amines (4) in high yields and enantioselectivities if treated with Hantzsch dihydropyridine 3.
Remarkable Differences in Reactivity between Benzothiazoline and Hantzsch Ester as a Hydrogen Donor in Chiral Phosphoric Acid Catalyzed Asymmetric Reductive Amination of Ketones
Kim, Kyung-Hee,Akiyama, Takahiko,Cheon, Cheol-Hong
, p. 274 - 279 (2016)
Described herein are differences in behavior between a Hantzsch ester and a benzothiazoline as hydrogen donors in the chiral phosphoric acid catalyzed asymmetric reductive amination of ketones with p-anisidine. The asymmetric reductive amination of ketone
C2-Symmetric Bicyclic Bisborane Catalysts: Kinetic or Thermodynamic Products of a Reversible Hydroboration of Dienes
Tu, Xian-Shuang,Zeng, Ning-Ning,Li, Ru-Ye,Zhao, Yu-Quan,Xie, De-Zhen,Peng, Qian,Wang, Xiao-Chen
, p. 15096 - 15100 (2018)
We prepared a new class of chiral C2-symmetric bicyclic bisborane catalysts by addition reactions of internal dienes with the Piers borane, HB(C6F5)2, and an analogue, HB(p-C6F4H)2. The dependence of the addition pattern on the reaction temperature allowed us to selectively prepare two diastereomeric catalysts from a single diene precursor. The bisboranes prepared in situ exhibited excellent activity (turnover numbers up to 200 at ?40 °C) and enantioselectivity (up to 95 % ee) in imine hydrogenation reactions.
Synthesis and application of a new pseudo C2-symmetric tertiary diamine for the enantioselective addition of MeLi to aromatic imines
Perron, Quentin,Alexakis, Alexandre
, p. 2503 - 2506 (2007)
A new tertiary pseudo C2-symmetric diamine derived from (1S,2S)-(+)-pseudoephedrine was synthesized and tested in the enantioselective addition of methyllithium on different aromatic imines. A comparative study with a similar C2-symm
Nucleophilic addition of organomagnesiums to aldimines: Scandium triflate (Sc(OTf)3) as an effective catalyst
Saito,Hatanaka,Yamamoto
, p. 1859 - 1861 (2001)
The 1,2-addition of organomagnesium reagents to p-methoxyphenyl (PMP)amine-derived aldimines proceeded effectively in the presence of catalytic amounts of Sc(OTf)3.
Enantioselective reaction of an imine with methyllithium catalyzed by a chiral ligand
Inoue,Shindo,Koga,Kanai,Tomioka
, p. 2527 - 2533 (1995)
Enantioselective reaction of benzaldehyde 4-anisidineimine 1 with methyllithium in toluene was mediated by a series of chiral aminoethers 3-11 to give the corresponding amine 2 in good to moderate ee. The chiral tridentate aminoethens 7-11 are superior to
Highly enantioselective reductive amination of simple aryl ketones catalyzed by Ir-f-Binaphane in the presence of titanium(IV) isopropoxide and iodine
Chi, Yongxiang,Zhou, Yong-Gui,Zhang, Xumu
, p. 4120 - 4122 (2003)
Using an Ir-f-Binaphane complex as the catalyst, complete conversions and high enantioselectivies (up to 96% ee) were achieved in the asymmetric reductive amination of aryl ketones in the presence of Ti(OiPr)4 and I2. A simple and efficient method of synthesizing chiral primary amines has been realized.
Synthesis of Chiral Cleft C,N-Palladium and Iridium Complexes from 2,3:6,7-Dibenzobicyclo[3.3.1]nona-2,6-diene-4,8-dione and Their Synthetic Applications
He, Congfa,Wang, Bin,Gao, Mingli,Gu, Zhenhua
, p. 1073 - 1078 (2017)
A transition-metal-mediated functionalization of 2,3:6,7-dibenzobicyclo[3.3.1]nona-2,6-diene-4,8-dione is reported. By the use of the corresponding imine, iridium or palladium complexes were prepared, and they were well characterized by NMR and single-cry
Asymmetric hydrogenation of imines with chiral alkene-derived boron Lewis acids
Liu, Xiaoqin,Liu, Ting,Meng, Wei,Du, Haifeng
, p. 8686 - 8689 (2018)
With the aim of developing easily accessible chiral Lewis acids for asymmetric hydrogenation, a variety of binaphthyl-based chiral alkenes were prepared in one step from the corresponding diols. Using the in situ generated chiral boron Lewis acids through
A new pseudo C2-symmetric tertiary diamine for the enantioselective addition of MeLi to aromatic imines
Gille, Segolene,Cabello, Noemi,Kizirian, Jean-Claude,Alexakis, Alexandre
, p. 1045 - 1047 (2006)
A new tertiary pseudo C2-symmetric 1,2-diamine derived from (1S,2S)-(+)-pseudoephedrine was synthesized and tested in the enantioselective addition of MeLi to aromatic imines. A comparative study with the analogous C2-symmetric ligan
