Abstract: The invention relates to the preparation process of 2-isopropylamino pyrimidine consisting in reaction at room temperature, 2-amino pyrimidine on acetone in the presence of an organic carboxylic acid, and of an excess of an alkaline borohydride.

Abstract: New bis-thioaralkyl/alkyl alkyl boranes for use in hydroboration and reduction reactions are disclosed. They have the formula:R.sub.4 R.sub.3 HB:R.sub.1 SASR.sub.2 :BHR.sub.3 R.sub.4wherein:A stands for a straignt, branched or cyclic hydrocarbon chain containing from 1 to 9 carbon atoms,R.sub.1 and R.sub.2 stand each for a straight or branched alkyl rest containing up to 5 carbon atoms in the longest chain, or benzyl radicals optionally substituted by one or more lower alkyl containing up to 5 carbon atoms or a halogen, andR.sub.3 and R.sub.4 stand for a hydrogen atom, a lower alkyl up to C.sub.6 or a mono or bicycloalkyl group.