A simple and efficient method for the conversion of oxiranes to thiiranes using ammonium thiocyanate (NH4SCN) under solvent- and catalyst-free conditions is described. These conditions enable clean and fast conversion of oxiranes to the corresponding thiirane.
Silica gel assisted synthesis of thiiranes
作者:Michael O. Brimeyer、Ashok Mehrota、Silvio Quici、Alok Nigam、Steven L. Regen
DOI:10.1021/jo01309a047
日期:1980.10
[Bmim]PF<sub>6</sub>: A Novel and Recyclable Ionic Liquid for Conversion of Oxiranes to Thiiranes in Aqueous Media
作者:J. S. Yadav、B. V. S. Reddy、Ch. Srinivas Reddy、K. Rajasekhar
DOI:10.1021/jo026544w
日期:2003.3.1
A variety of epoxides respond rapidly with potassium thiocyanate in [bmim]PF6-H2O (2:1) solvent system at room temperature under mild and convenient conditions to produce the corresponding thiiranes in high to quantitative yields. Enhanced rates, improved yields, and recyclability of ionic liquids are the remarkable features observed in ionic liquids (ILs). The use of ionic liquids for this transformation avoids the use of heavy metal halides as promoters and chlorinated hydrocarbons as solvents. The ionic liquid was recycled in five to six subsequent runs with gradual decrease in activity.
BRIMEYER M. O.; MEHROTA A.; QUICI S.; NIGAM A.; REGEN S. L., J. ORG. CHEM., 1980, 45, NO 21, 4254-4255
作者:BRIMEYER M. O.、 MEHROTA A.、 QUICI S.、 NIGAM A.、 REGEN S. L.