Method of preparing trialkyl-tin hydrides

US5288886A · kind A · utility

Assignee

• Witco Corporation · US

Inventors

• Ralf Becker · Langen, DE
• Ulrich Stewen · Schwerte, DE
• Udo Weinberg · Bergkamen, DE

Key dates

• Filing date: Jul 1, 1993
• Grant date: Feb 22, 1994
• Expiry date: Jul 1, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/2208
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention concerns a method of preparing trialkyl-tin hydrides by a process that ensures outstanding long-term stability. Bis-[trialkyl-tin]oxides are dissolved in a solvent that mixes only to some extent, if at all, with water and converted with an aqueous solution of sodium borohydride stabilized with a base. The product is obtained by phase separation and optionally by distillation. The trialkyl-tin hydride is obtained almost quantitatively with a yield of more than 95%.