Three sulfur-containing methylphosphonates, dibutyl propylthiomethylphosphonate, (C4H8O)2P(0)CH2SC3H7,(DBPTMP),dibutyl propylsulfinylmethylphosphonate, (C4H90)2P(0)CH2S(0)C3H7, (DBPSiMP) and dibutyl propylsulf onylmethylphosphonate, (C4H8O)2P(0)CH2S(0) C3H7(DBPSiMP) were synthesized. The extraction of gold(III), palladium(II) and platinum(IV) from HCl media with the synthesized compounds and dibutyl 2-keto-3-methylbutyl-phosphonate, (C4H8O)2P(0)CH2C (0) CH(CH3) CH3, (DBKPP) was investigated at various mixing times and acidities. DBPTMP and DBPSiMP were found to provide nearly quantitative extraction of Au(III) and Pd(II) with short equilibration times for Pd(II) extraction. DBKPP was selective for Au(TII) over Pt(IV) and Pd(II) at high acidity. The behavior of these extractants was also examined in comparison with the corresponding monofunctional extractants, dibutyl butylphosphonate(DB‘BP’), tributyl-phosphate(TBP), dioctylsulphide(DOS) and dioctyl-sulphoxide(DOSO).