Asymmetric transfer hydrogenation of heterocycle-containing acetophenone derivatives using N-functionalised [(benzene)Ru(II)(TsDPEN)] complexes
作者:Jonathan Barrios-Rivera、Yingjian Xu、Guy J. Clarkson、Martin Wills
DOI:10.1016/j.tet.2021.132562
日期:2022.1
The application of enantiomerically-pure ruthenium(II) catalysts containing N - functionalised TsDPEN ligand to the asymmetric transferhydrogenation of 15 examples of α-heterocyclic acetophenone derivatives is reported. Products of up to 99% ee were formed.
报道了含有 N-官能化 TsDPEN 配体的对映体纯钌 (II) 催化剂在 15 个 α-杂环苯乙酮衍生物实例的不对称转移氢化中的应用。形成高达 99% ee 的产物。
Enantioselective Hydrogenation and Transfer Hydrogenation of Bulky Ketones Catalysed by a Ruthenium Complex of a Chiral Tridentate Ligand
作者:M. Belén Díaz-Valenzuela、Scott D. Phillips、Marcia B. France、Mary E. Gunn、Matthew L. Clarke
DOI:10.1002/chem.200801929
日期:2009.1.19
substrates such as bulky heterocyclic ketones. Unusually for a pressure hydrogenation catalyst, similar enantioselectivity can be obtained under transferhydrogenation conditions. The transferhydrogenations are somewhat slower than the pressure hydrogenations, but this drawback is readily overcome, since we have discovered that a microwave accelerated transferhydrogenation of the above ketones occurs within
A highly versatile method for the preparation of enantiopure 1-substituted, 1,2-disubstituted, and 1,4,5-trisubstituted imidazoles was developed by using the cyclocondensation reaction of a 1,2-dicarbonyl compound, an aldehyde, a 1,2-amino alcohol, and ammonium acetate.
Highly efficient and enantioselective synthesis of β-heteroaryl amino alcohols <i>via</i> Ru-catalyzed asymmetric hydrogenation
作者:Chao Wu、Baode Ma、Gen-Qiang Chen、Xumu Zhang
DOI:10.1039/d2cc03701g
日期:——
Chiral β-heteroaryl amino alcohols are key fragments of many bioactive compounds and antibiotics, and the development of efficient synthetic methods for these compounds is of great value. The highlyenantioselective hydrogenation of α-N-heteroaryl ketones was realized with a ruthenium-diphosphine–diamine catalyst, providing the corresponding chiral β-heteroaryl amino alcohols with up to 99% yield and
New Promising Compounds with in Vitro Nanomolar Activity against <i>Trypanosoma cruzi</i>
作者:Laura Friggeri、Luigi Scipione、Roberta Costi、Marcel Kaiser、Francesca Moraca、Claudio Zamperini、Bruno Botta、Roberto Di Santo、Daniela De Vita、Reto Brun、Silvano Tortorella
DOI:10.1021/ml400039r
日期:2013.6.13
The antiparasitic activity of azole and new 4-aminopyridine derivatives has been investigated. The imidazoles 1 and 3-5 showed a potent in vitro antichagasic activity with IC50 values in the low nanomolar concentration range. The (S)-1, (S)-3, and (S)-5 enantiomers showed (up to) a thousand-fold higher activity than the reference drug benznidazole and furthermore low cytotoxicity on rat myogenic L6 cells.