abstract |
Amino derivs. of general formula (1), are prepd. from an iso-thio-carbamide of formula R1NH(CH2)nNHR2 (IV), and a disamine of formula (V) in presence of a catalyst. In formulae, R1 and R2 are H or 1-4C alkyl, or R1 and R2 together are ethylene or propylene; n= 2 or 3. |