Preparation method of alkali amino borohydride and alkali amino borohydride complex

摘要

PCT No. PCT/EP95/04500 Sec. 371 Date Jun. 25, 1997 Sec. 102(e) Date Jun. 25, 1997 PCT Filed Nov. 16, 1995 PCT Pub. No. WO96/16066 PCT Pub. Date May 30, 1996A process is disclosed for preparing a compound of the Formula M (R1R2N.BH3) or a complex thereof of the Formula M (R1R2N.BH3).xL wherein M is Li, Na, K, Rb or Cs; R1 is H, an aliphatic C1 to C5 residue, an aromatic residue, or a cycloaliphatic residue; R2 is H, an aliphatic C1 to C5 residue, an aromatic residue, or a cycloaliphatic residue; or R1 and R2 form a common cyclic residue; L is a dipolar aprotic solvent; and x is a numerical value from 0.1 to 5, which comprises the steps of: (a) where the compound of the Formula M(R1R2N.BH3) is prepared, reacting a compound of the Formula R1R2NH.BH3 with an alkali metal or an alkali metal amide in a non-polar aliphatic or aromatic solvent; or (b) where the complex of the Formula M(R1R2N.BH3).xL is prepared, reacting the compound of the Formula R1R2NH.BH3 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.