Abstract alkyl-substituted polyamines, valuable for biological studies, can be prepared from N-phenylmethoxycarbonyl-1, 4-diaminobutane (1b) and N-phenylmethoxycarbonyl-4- azidobutanamine (4a) by utilising the following reactions:(i) reduction of the phenylmethoxycarbonyl group to methyl by borane [leading from (1b) to (1g),(1h) and (1j)] and (ii) combination of the Staudinger and aza-Wittig reactions [leading from (4a) to (1c),( ...
