Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The water-soluble composition rhodium/tris (sodium 3-sulfophenyl) phosphine (TPPTS) selectively catalyses the condensation of isoprene with active methylene compounds. An efficient synthesis of isofeprazone is described. ... 1.90 et 1.75 IR (KBr, cm −1) . ν C 0: 1770-1700; νNH ...