Reduction of semipolar sulphur linkages with carbodithioic acids and addition of carbodithioic acids to olefins
作者:S. Oae、T. Yagihara、T. Okabe
DOI:10.1016/s0040-4020(01)93661-0
日期:1972.1
Carbodithioic acids react with trivalent sulphur compounds bearing semipolarlinkages (sulphoxides, sulphonium ylides and sulphilimines), to give the corresponding sulphides and add to olefins to afford dithioesters. The orientation of olefin addition is controlled by the olefin nature. Michael type addition takes place with olefins bearing an electron-withdrawing group α to the double bond while Markownikoff
Thiocarbonylthio Compounds (SC(Z)S−R) in Free Radical Polymerization with Reversible Addition-Fragmentation Chain Transfer (RAFT Polymerization). Effect of the Activating Group Z
作者:John Chiefari、Roshan T. A. Mayadunne、Catherine L. Moad、Graeme Moad、Ezio Rizzardo、Almar Postma、Melissa A. Skidmore, and、San H. Thang
DOI:10.1021/ma020883+
日期:2003.4.1
Free-radical polymerization in the presence of suitable addition−fragmentation chain transfer agents [SC(Z)S−R] (RAFT agents) possess the characteristics of a living polymerization (i.e., polymer products can be reactivated for chain extension and/or block synthesis, molecular weights are predetermined by RAFT agent concentration and conversion, narrow polydispersities are possible). Styrene polymerizations