Synthesis of vinyl sulfides using glycerol as a recyclable solvent
作者:Eder J. Lenardão、Márcio S. Silva、Renata G. Lara、Júnior M. Marczewski、Maraisa Sachini、Raquel G. Jacob、Diego Alves、Gelson Perin
DOI:10.3998/ark.5550190.0012.222
日期:——
alkynes promoted by KF/Al2O3, usingglycerol as recyclablesolvent. This improved method furnishes selectively the corresponding anti-Markovnikov vinylsulfides in good to excellent yields starting from terminal alkynes and aliphatic or aromatic thiols. The irradiation with microwaves facilitated the procedure and accelerates the reaction. The catalytic system and the glycerol can be re-used up to four
Ruthenium-catalyzed cross-metathesis with electron-rich phenyl vinyl sulfide enables access to 2,3-dideoxy-<scp>d</scp>-ribopyranose ring system donors
units are important ringsystems found in nature. Herein, we develop a metal-mediated strategy to form this important scaffold featuring a cross-metathesis reaction of the corresponding sugar-derived hydroxyalkene with electron-rich phenyl vinylsulfide using commercially available ruthenium-catalysts under microwave irradiation as a key step. The final 2,3-dideoxyhexopyranose ring is generated in a
Air Oxidative Radical Oxysulfurization of Alkynes Leading to α-Thioaldehydes
作者:Shao-Fang Zhou、Xiang-Qiang Pan、Zhi-Hao Zhou、Adedamola Shoberu、Pei-Zhi Zhang、Jian-Ping Zou
DOI:10.1021/acs.joc.5b00641
日期:2015.5.15
Air oxidative radical oxysulfurization of alkynes initiated by 0.5 mol % tert-butyl hydroperoxide with arylthiols is described. The reaction proceeded at room temperature in the presence of 5% mol water to afford selective a-thioaldehydes.
Synthesis of vinyl sulfides under base-free conditions using selenium ionic liquid
作者:Samuel Thurow、Naiana T. Ostosi、Samuel R. Mendes、Raquel G. Jacob、Eder J. Lenardão
DOI:10.1016/j.tetlet.2012.03.076
日期:2012.5
A very simple procedure is described for the efficient synthesis of vinyl sulfides by hydrothiolation of terminal alkynes using 1-n-butyl-3-methylimidazolium methylselenite, [bmim][SeO2(OCH3)]. The reaction proceeds cleanly under mild, base-free conditions and was performed with aromatic and aliphatic thiols. (C) 2012 Elsevier Ltd. All rights reserved.
ICHINOSE, YOSHIFUMI;WAKAMATSU, KUNI;NOZAKI, KYOKO;BIRBAUM, JEAN-LUC;OSHIM+, CHEM. LETT.,(1987) N 8, 1647-1650