Technical Abstract: Phosphorous was incorporated into the middle of the fatty chain on a methyl ester utilizing an epoxide route. Methyl oleate was epoxidized and then a catalyzed or uncatalyzed ring opening reaction was performed using dibutyl phosphate in order to synthesize a butyl dioxaphospholane-containing derivative of methyl octadecanoate. Utilizing a titanium and zirconium oxide catalyst, a yield of 37% is possible. A similar reaction is possible using bis-2-ethylhexyl phosphate. However, an aryl phosphate, diphenyl phosphate, was not active in these reactions. These compounds are likely to be useful extreme pressure lubricant additives which will be highly compatible with soybean oil-based lubricants, and is also sulfur and metal free.