Sulfur derivatives have been studied extensively as useful precursors for pharmaceutically, biologically, and chemically important compounds due to their extensive use in modern synthetic chemistry. [11. Simpkins , S. 1993. Sulfones in Organic Synthesis, Oxford: Pergamon Press. ... View all references, 24. Clark , E. 1997. Kirk-Othmer Encyclopedia of Chemical Technology, , 4th ed., Edited by: Kroschwitz , JI and Howe-Grant , M. Vol. 23, 134–146. New York: Wiley.