Patent ID: 7495128
Filing Date: 2009-02-24
Classification: C07C,C08F,C08G

Abstract:
1. A method for forming an s,s′-bis-(α, α′-disubstituted-α″-acetic acid)-trithiocarbonate compound of the formula: comprising the steps of: reacting carbon disulfide and a base in the optional presence of a phase transfer catalyst selected from a polyether, an onium salt, and combinations thereof to form an intermediate trithio structure; reacting said trithio intermediate with a 1,1-disubstituted-2,2-dihaloepoxide, or with the reaction product of a haloform and a ketone in the presence of said base, to form a dicarboxylated salt, and acidifying said dicarboxylated salt to form said s,s′-bis-(α, α′-disubstituted-α″-acetic acid)-trithiocarbonate; wherein said 1,1-disubstituted-2,2-dihaloepoxide is represented by the formula: wherein R 1 and R 2 , independently, are selected from a substituted and unsubstituted alkyl having from 1 to about 6 carbon atoms, and substituted and unsubstituted aryl; wherein said substituents, independently, are selected from an alkyl having from 1 to 6 carbon atoms, aryl, halogen, cyano, an ether having a total of 2 to 20 carbon atoms, nitro, and combinations thereof; or wherein R 1 and R 2 are part of a cyclic ring having 5 to 12 total carbon atoms.