N-substituted-2-amino-2-methyl-1-propanols as potential antitumor agents

Phosphorus GABA Analogues as Potential Prodrugs

Analogues of γ-aminobutyric acid (GABA), wherein a P=O moiety is separated by three carbon atoms from an amino group, were incorporated into Schiff bases as potential acid-labile carrier molecules. These include 3-aminophenylphosphonic acid, its dimethyl ester and its previously unreported N,N'-diisopropylphosphonodiamide. A benzophenone derivative of GABA was also synthesized.A study of the degrees of in vitro hydrolysis of four Schiff bases indicated that lability of the C=N bond is determined by electronic influences of ring substituents.All new products were tested for abilities to inhibit maximal electroshock- and subcutaneous pentylenetetrazol (Metrazol)-induced seizures in mice.Activity was found only in the former system with moderate inhibition displayed by two dimethyl ester and the GABA Schiff bases.

Syntheses and evaluation of ketals, hemithioketals, and dithioketals of conjugated styryl ketones principally for antineoplastic activity

Ketals, hemithioketals, and dithioketals of nuclear-substituted styryl ketones were prepared as latentiated forms of the ketones. This undertaking was based on the premise that there is increased acidity in tumors compared to normal tissue, and thus preferential regeneration of the ketone in neoplastic tissue may occur. Attempts to form 1,3-dioxolans of Mannich bases were unsuccessful. The prepared compounds did not possess significant anticancer properties, but analgesic, antiinflammatory, antihistaminic, and antimicrobial activities were found in the prepared Mannich bases.