“…This was first accomplished by Aggarwal et al using a water-soluble DCC variant reagent (morpho CDI 82) to transform the formaldehyde-alkylated bis(sulfoxide) 81 into methylenebis(sulfoxide) 83 (Scheme 22). [9] Another report by Carretero et al [87] mentions the synthesis of the (S,S)-1,1-bis(ethoxycarbonyl)-2,2-bis(p-tolylsulfinyl)ethene (86), in a two-step sequence involving first a quantitative condensation with oxomalonate, followed by a dehydration of 85 with DEAD. [9] Another report by Carretero et al [87] mentions the synthesis of the (S,S)-1,1-bis(ethoxycarbonyl)-2,2-bis(p-tolylsulfinyl)ethene (86), in a two-step sequence involving first a quantitative condensation with oxomalonate, followed by a dehydration of 85 with DEAD.…”