Titanocene(II)-promoted desulfurizative acylation of thioacetals with alkanenitriles
作者:Takeshi Takeda、Haruhiko Taguchi、Tooru Fujiwara
DOI:10.1016/s0040-4039(99)02001-8
日期:2000.1
Ketones were obtained in good yields by titanocene(II)-promoted reaction of thioacetals with alkanenitriles. The regioselective formation of α-substituted ketone was observed when the reaction was carried out in the presence of methyl iodide or benzyl bromide.
Configurational stability of chiral organolithium compounds on the time scale of their addition to aldehydes
作者:Reinhard W. Hofmann、Manfred Julius、Fabrice Chemla、Thomas Ruhland、Gerlinde Frenzen
DOI:10.1016/s0040-4020(01)90457-0
日期:1994.1
A test based on kinetic resolution has been applied to the α-bromo-, α-phenylseleno- and α-phenylthio-alkyl-lithium compounds 1, which shows that addition of these species to the chiral aldehyde 6 occurs faster than enantiomer equilibration of the organolithiumcompounds.
Cerium Triflate: An Efficient and Recyclable Catalyst for Chemoselective Thioacetalization of Carbonyl Compounds under Solvent-Free Conditions
作者:Anil Kumar、M. Sudershan Rao、V. Kameshwara Rao
DOI:10.1071/ch09296
日期:——
A simple and efficient chemoselectivethioacetalization of carbonylcompounds has been achieved using Ce(OTf)3 (10 mol-%) as a catalystunder solvent-free conditions. Advantages of the methodology include very short reaction times, excellent yields, the catalytic use of a water tolerant Lewis acid, and simple recovery and reuse of the catalyst.
An indium–TMSCl promoted reaction of diphenyl diselenide and diorganyl disulfides with aldehydes: novel routes to selenoacetals, thioacetals and alkyl phenyl selenides
作者:Brindaban C. Ranu、Amit Saha、Tanmay Mandal
DOI:10.1016/j.tet.2008.12.079
日期:2009.3
The reactions of diphenyldiselenide and dialkyl disulfides with aldehydes in the presence of In–TMSCl have been investigated. Aliphatic aldehydes provide the corresponding selenoacetals and aromatic aldehydes lead predominantly to benzyl phenyl selenides on reaction with diphenyldiselenide. However, the reaction of dimethyl disulfide and diphenyl disulfide with both aromatic and aliphatic aldehydes
Selenonium ionic liquid as an efficient catalyst for the synthesis of thioacetals under solvent-free conditions
作者:Eder J. Lenardão、Elton L. Borges、Samuel R. Mendes、Gelson Perin、Raquel G. Jacob
DOI:10.1016/j.tetlet.2008.01.096
日期:2008.3
tetrafluoroborate, [BEPSe]BF4, was successfully employed as a catalyst for the synthesis of several dithioacetals in the absence of a solvent. The method is general and selectively afforded thioacetals derived fromaldehydes and ketones in good yields.