Synthesis and Properties of Alkane-1,2-disulfonate Surfactants.
摘要:
Synthesis of pure alkane-1,2-disulfonic acids was accomplished by oxidation of the corresponding 1,2-dithiols or cyclic trithiocarbonates. The dithiols were obtained from the epoxides via the thiiranes, or by reacting the corresponding olefin with S2Cl2 and subsequent treatment with NaHS. The trithiocarbonates were prepared by reaction of the epoxides with potassium O-methyl dithiocarbonate. The disodium salts of the 1,2-disulfonic acids exhibited surfactant properties with critical micelle concentration (CMC) values between 10(-3) and 10(-4) M.
Synthesis and Properties of Alkane-1,2-disulfonate Surfactants.
摘要:
Synthesis of pure alkane-1,2-disulfonic acids was accomplished by oxidation of the corresponding 1,2-dithiols or cyclic trithiocarbonates. The dithiols were obtained from the epoxides via the thiiranes, or by reacting the corresponding olefin with S2Cl2 and subsequent treatment with NaHS. The trithiocarbonates were prepared by reaction of the epoxides with potassium O-methyl dithiocarbonate. The disodium salts of the 1,2-disulfonic acids exhibited surfactant properties with critical micelle concentration (CMC) values between 10(-3) and 10(-4) M.
A method of making certain 2,3-dihydro-1,4-dithiins of the following formula by the action of alpha-hydroxyketones (acyloins) of 1,2-dithiols: ##STR1## wherein R.sup.1 and R.sup.2 are hydrogen or alkyl having 1 to 6 carbon atoms or are joined together to form a ring with 3 or 4 methylene groups, and R.sup.3 and R.sup.4 are hydrogen or the same or different alkyl groups having 1 to 10 carbon atoms, which alkyl groups may be substituted with lower alkoxy groups.
Method of making certain 2,3-or 5,6-dihydro-1,4-dithiins
申请人:UNIROYAL LIMITED
公开号:EP0053494A1
公开(公告)日:1982-06-09
A method of making certain 2,3-dihydro-1,4-dithiins of the following formula by the action of alpha-hydroxyketones (acy- loins) on 1,2-dithiols:
wherein R1 and R2 are hydrogen or alkyl having 1 to 6 carbon atoms or are joined together to form a ring with 3 or 4 methylene groups, and R3 and R4 are hydrogen or the same or different alkyl groups having 1 to 10 carbon atoms, which alkyl groups may be substituted with lower alkoxy groups.