Asymmetric transfer hydrogenation of ketones using Ru(0) nanoparticles modified by Chiral Thiones
作者:Noor U. Din Reshi、Dineshchakravarthy Senthurpandi、Ashoka G. Samuelson
DOI:10.1002/aoc.4885
日期:2019.5
The catalytic asymmetric transfer hydrogenation (ATH) of acetophenone in isopropanol by Ru(0) nanoparticles (NPs) obtained by the in‐situ reduction of Ru (II) half‐sandwich complexes of chiral 2‐oxazolidinethiones and 2‐thiozolidinethiones was examined and compared with the catalytic activity of Ru(0) NPs formed in‐situ by the reduction of [Ru(p‐cymene)(Cl)2]2 in presence of optically active ligands
Total Synthesis of the Epidermal Growth Factor Inhibitor (−)-Reveromycin B
作者:Anthony N. Cuzzupe、Craig A. Hutton、Michael J. Lilly、Robert K. Mann、Kenneth J. McRae、Steven C. Zammit、Mark A. Rizzacasa
DOI:10.1021/jo001646c
日期:2001.4.1
The total synthesis of the epidermal growth factor inhibitor reveromycin B (2) in 25 linear steps from chiral methylene pyran 13 is described. The key steps involved an inverse electron demand hetero-Diels-Alderreaction between dienophile 13 and diene 12 to construct the 6,6-spiroketal 11 which upon oxidation with dimethyldioxirane and acid catalyzed rearrangement gave the 5,6-spiroketal aldehyde
Optically active allylic sulphides 10–13, bearing two different leaving groups, react with organocopper reagents by selective substitution of the heterocyclic moiety leading to optically active homoallylic pivalates with chemo-, regio- and enantio- control. This selectivity seems to be related to the coordination exerted by the heterocyclic nucleus towards the organometal.
Thiocarbonyl Surrogate via Combination of Sulfur and Chloroform for Thiocarbamide and Oxazolidinethione Construction
作者:Wei Tan、Jianpeng Wei、Xuefeng Jiang
DOI:10.1021/acs.orglett.7b00819
日期:2017.4.21
An efficient and practical thiocarbonyl surrogate via combination of sulfur and chloroform has been developed. A variety of thiocarbamides and oxazolidinethiones have been established, including chiral thiourea catalysts and chiral oxazolidinethione auxiliaries with high selectivity. Meanwhile, pesticides Diafenthiuron (an acaricide), ANTU (a rodenticide), and Chloromethiuron (an insecticide) were
Synthesis, X-ray Analysis, and Biological Activities of Novel Oxazolidinethiones
作者:Nezire Saygılı、Meral Özalp、Leyla Tatar Yıldırım
DOI:10.1002/jhet.1863
日期:2014.9
Oxazolidinethione compounds were synthesized starting from racemic and enantiopure β‐amino alcohols. The molecular structure of oxazolidinethione 6a was elucidated by single‐crystal x‐ray crystallography. Oxazolidinethione compounds screened for antimicrobial activity showed mild minimum inhibitory concentration values.