Process for preparing alkaline aminoborohydrides and alkaline aminoborohydride complexes

US5808070A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Heinrich Noth · Grünwald, DE
• Steffen Thomas · Richmond Hill, US
• Peter Rittmeyer · Pocking, DE
• Ulrich Wietelmann · Friedrichsdorf, DE

Key dates

• Filing date: Jun 25, 1997
• Grant date: Sep 15, 1998
• Expiry date: Jun 25, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F5/025
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for preparing a compound of the Formula EQU M (R.sup.1 R.sup.2 N.BH.sub.3) or a complex thereof of the Formula EQU M (R.sup.1 R.sup.2 N.BH.sub.3).xL wherein PA1 M is Li, Na, K, Rb or Cs; PA1 R.sup.1 is H, an aliphatic C.sub.1 to C.sub.5 residue, an aromatic residue, or a cycloaliphatic residue; PA1 R.sup.2 is H, an aliphatic C.sub.1 to C.sub.5 residue, an aromatic residue, or a cycloaliphatic residue; or PA1 R.sup.1 and R.sup.2 form a common cyclic residue; PA1 L is a dipolar aprotic solvent; and PA1 x is a numerical value from 0.1 to 5, which comprises the steps of: PA1 (a) where the compound of the Formula M(R.sup.1 R.sup.2 N.BH.sub.3) is prepared, reacting a compound of the Formula EQU R.sup.1 R.sup.2 NH.BH.sub.3 with an alkali metal or an alkali metal amide in a non-polar aliphatic or aromatic solvent; or PA1 (b) where the complex of the Formula M(R.sup.1 R.sup.2 N.BH.sub.3).xL is prepared, reacting the compound of the Formula EQU R.sup.1 R.sup.2 NH.BH.sub.3 with an alkali metal or an alkali metal amide in the dipolar, aprotic solvent or is a mixture of the dipolar aprotic solvent and the non-polar aliphatic or aromatic solvent.