This invention is directed to novel and known stufur containing compounds and pharmaceutically acceptable salts thereof that have utility as antifungals and as antiproliferative agents against mammalian cells, in particular cancer cells and most particularly leukemia-derived cells. The invention provides a method for synthesizing certain of the sulfur containing compounds that is more efficient than previously known methods.
Treatment of 4-acetoxy-2-azetidinone (9) with various sodium alkyl trithiocarbonates gave 4-[(alkylthio) thiocarbonyl] thioazetidinones 10, which were converted into the phosphoranes 8. Intramolecular Wittig reactions of 8 followed by deblocking yielded penem-3-carboxylic acids 5.
Dipolar and Nonpolar Altitudinal Molecular Rotors Mounted on an Au(111) Surface
作者:Xiaolai Zheng、Mary E. Mulcahy、Dominik Horinek、Francesco Galeotti、Thomas F. Magnera、Josef Michl
DOI:10.1021/ja039482f
日期:2004.4.1
tentacles with affinity to metal surfaces and holding an axle that carries a dipolar or a nonpolar rotator. The dipolarrotor exists as three pairs of enantiomers, rapidly interconverting at room temperature. When mounted on a gold surface, each molecule represents a chiral altitudinal rotor, with the rotator axle parallel to the surface. The surface-mounted rotor molecules are characterized by several
Widening the Latency Gap in Chelated Ruthenium Olefin Metathesis Catalysts
作者:Yakov Ginzburg、Aviel Anaby、Yuval Vidavsky、Charles E. Diesendruck、Amos Ben-Asuly、Israel Goldberg、N. Gabriel Lemcoff
DOI:10.1021/om200323c
日期:2011.6.27
The synthesis of novel sulfur-chelated ruthenium benzylidenes afforded latentcatalysts with a wider range of activities and new isomeric forms. A ruthenium complex with a tridentate ligand displayed latency for even one of the most reactive ROMP monomers, dicyclopentadiene, while a room temperature latent trifluoromethyl-substituted thioether derivative was shown to be the most active sulfur-chelated
On the relative migratory aptitudes of carbon and heteroatoms in borate complexes. A surprising α-thia effect
作者:Jonathan M. Stoddard、Kenneth J. Shea
DOI:10.1039/b311292f
日期:——
Dimethylsulfoxonium methylide reacts with dicyclohexyl alpha-thiophenylmethyl)methylborane via 1,2-alkyl migration and alkyldithiaborolane via 1,2-sulfur migration.