<i>ansa</i>-Ruthenium(II) Complexes of R<sub>2</sub>NSO<sub>2</sub>DPEN-(CH<sub>2</sub>)<sub>n</sub>(η<sup>6</sup>-Aryl) Conjugate Ligands for Asymmetric Transfer Hydrogenation of Aryl Ketones
作者:Andrea Kišić、Michel Stephan、Barbara Mohar
DOI:10.1002/adsc.201500288
日期:2015.8.10
New 3rd generation designer ansa‐ruthenium(II) complexes featuring N,C‐alkylene‐tethered N,N‐dialkylsulfamoyl‐DPEN/η6‐arene ligands, exhibited good catalytic performance in the asymmetric transfer hydrogenation (ATH) of various classes of (het)aryl ketones in formic acid/triethylamine mixture. In particular, benzo‐fused cyclic ketones furnished 98 to >99.9% ee using a low catalyst loading.
&#945;-Pinene-Based New Chiral Ionic Liquids and their Application as Phase Transfer Catalysts in Enantioselective Addition of Diethylzinc to Aldehydes
作者:Sanjay Malhotra、Yun Wang、Vineet Kumar
DOI:10.2174/157017809787893073
日期:2009.4.1
Amino alcohol functionalized new chiral ionicliquids have been synthesized from (+)-α-pinene, an easily available natural product. The effectiveness of these CILs as phase transfer catalysts (PTC) in enantioselective C-C bond formation has been demonstrated through the addition of diethylzinc to representative aldehydes, and the corresponding chiral alcohols with good yields and enantiomeric excess
The synthesis of chiral amino diol tridentate ligands and their enantioselective induction during the addition of diethylzinc to aldehydes
作者:An-lin Zhang、Li-wen Yang、Nian-fa Yang、Yan-ling Liu
DOI:10.1016/j.tetasy.2013.11.007
日期:2014.2
A series of C2-symmetric chiral amino diol tridentate ligands 3a–g were prepared fromachiral bulky organolithiums, achiral bulky primary amines, and optically active epichlorohydrin (ECH). The prepared C2-symmetric chiral amino diol tridentate ligands were capable of inducing enantioselectivity in the model reaction of aromatic and aliphatic aldehydes with diethylzinc with an ee of up to 96%. The
A method of deterring biofouling of a surface comprising attaching an adduct having formula (I) or noradrenalin to the surface. Formula (I) being defined as compounds that have the formula A-L-R wherein A is i) a C6 or C10 substituted aryl ring, or ii) a C1-C9 substituted or unsubstituted heteroaryl ring: L is a linking group, and R is a primary amino moiety comprising unit.
The stereodivergent asymmetric synthesis of a range of 2-(1′-hydroxyalkyl)phenols
作者:Stephen G. Davies、W. Ewan Hume、Paul M. Roberts、James E. Thomson
DOI:10.1016/j.tet.2010.07.058
日期:2010.10
be completely diastereoselective, giving access to either epimer of the corresponding benzylic alcohol complexes in >99:1 dr. Subsequent oxidative removal of the chromium tricarbonyl unit, followed by cleavage of the O-α-methylbenzyl chiral auxiliary gives enantiopure 2-(1′-hydroxyalkyl)phenols. Following this stereodivergent procedure, either enantiomer of the product may be accessed from a single