New synthetic routes to vinyl sulfides, ketene thioacetals and their seleno analogues from carbonyl compounds
作者:J.N. Denis、S. Desauvage、L. Hevesi、A. Krief
DOI:10.1016/s0040-4039(01)82051-7
日期:1981.1
Title compounds have been prepared from carbonyl compounds by formal removal of hydroxyl and sulfenyl or hydroxyl and selenyl moieties from the corresponding functionalized β-hydroxysulfides or β-hydroxyselenides.
Expeditious and Chemoselective Synthesis of α-Aryl and α-Alkyl Selenomethylketones via Homologation Chemistry
作者:Raffaele Senatore、Laura Castoldi、Laura Ielo、Wolfgang Holzer、Vittorio Pace
DOI:10.1021/acs.orglett.8b00896
日期:2018.5.4
Diselenoacetals, previously considered byproducts in homologation tactics en route to α-selenoketones, are herein found to be excellent starting materials for this purpose. The easy selenium/lithium exchange they undergo affords seleno carbanions which are smoothly added to Weinreb amides to chemoselectively prepare α-aryl- and α-alkyl seleno methylketones through a single chemical operation. No racemization
Complexes of trimethylplatinum(<scp>IV</scp>) halides with dithio- and diselenoethers, dimethyl disulphide, and dimethyl diselenide
作者:Edward W. Abel、A. Rauf Khan、Kenneth Kite、Keith G. Orrell、Vladimir Šik
DOI:10.1039/dt9800001169
日期:——
Trimethylplatinum(IV) halides react with MeE(CH2)nEMe, E = S or Se, n= 2 or 3, to give mononuclear species [PtXMe3MeE(CH2)n EMe}], X = Cl, Br or I. Under similar conditions the ligands L–L = MeECH2EMe, MeECH(Me)EMe, and MeEEMe, E = S or Se, give dinuclear complexes [(PtXMe3)2(L–L)] in which the S or Se donor ligand bridges the metal atoms. Structural asignments are based on 1H n.m.r. solution studies
Preparation and crystal structures of [SnCl4(MeSCH2SMe)] and [SnCl4(MeSeCH2SeMe)]: dithio- and diseleno-ether complexes incorporating highly strained four-membered chelate rings
作者:Anthony R. J. Genge、William Levason、Gillian Reid
DOI:10.1039/a706876j
日期:——
The preparation and crystal structures of [SnCl4(MeSCH2SMe)] and [SnCl4(MeSeCH2SeMe)], the first examples showing bidentate chelation of these methylene bridged dithio- and diseleno-ethers, have been described.
1,3-intramolecular metal shifts in some pentacarbonyl-chromium and -tungsten derivatives of bis-, tris- and tetrakis(methylthio)methane and bis(methylseleno)methane. A dynamic nuclear magnetic resonance investigation
作者:Edward W. Abel、Thomas E. Mackenzie、Keith G. Orrell、Vladimir Šik
DOI:10.1016/s0277-5387(00)86551-1
日期:1987.1
synthesized and characterized. In addition to the facile atomic inversions of the metal co-ordinated sulphur and selenium atoms, there are intramolecular 1,3-metallotropic shifts among all the available co-ordination sites on each ligand. From dynamic NMR studies activation energies have been determined for these metal commutations.