It has been shown that 4-[3-(l-silatranyl) propylamino] quinolines [I, 2], and 3-(triethylsilyl)- and 3-(l-silatranyl) propylamides of quinolinecarboxylic acids [3] possess some antiblastic activity. Continuing these studies, we have synthesized the N-substituted amides of y- trialkylsilylbutyric acids with aminoquinolines (la-f), with 1, 2, 3, 4-tetrahydroquinoline (lla, b), with 1, 2, 3, 4-tetrahydroisoquinoline (Ilia, b), and with N-methylpiperazine (Va-c), the ester ...