Process for making thiophosphine compounds

US7378556B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Sirisoma Wanigatunga · Bound Brook, US
• Aref Jallouli · Midland, US
• Martin Rickwood · Clarks Summit, US
• Yassin Turshani · Largo, US

Key dates

• Filing date: Oct 20, 2006
• Grant date: May 27, 2008
• Expiry date: Oct 20, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/05
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is a process for making a thiophosphine compound of formula (I):wherein X represents SH orwith R1 being H or —CH3, R and R′ represent, independently from each other, an alkyl radical, an alkoxy radical, an aryl radical or a phenyl radical which may be substituted with one or more alkyl and/or alkoxy groups, n is an integer from 0 to 4, n′ is an integer from 0 to 5, x is an integer from 0 to 2, y is an integer from 1 to 5 with the proviso that y+n is an integer from 1 to 5, wherein y =1, X is in para position with regard to phosphorus and represents SH.