Yong-Gyun Lee

SYNTHESIS OF 2,4-DISUBSTITUTED NORTROPINONE DERIVATIVES BY ALDOL CONDENSATION

2,4-Disubstituted nortropinone derivatives 2, with anticipated anticonvulsant activity, were synthesized by the reaction of N-substituted nortropinones, ethanol, 5N-NaOH, and aromatic aldehydes (R1CHO).

Synthesis of the New Saccharin Derivatives Containing Imidazolidine-2,4,5-trione or 2-Thio-imidazolidine-4, 5-dione Group

Saccharin derivatives were synthesized by means of 4 reaction steps involved the reaction of 1-methylurea (or 1-methylthiourea) and oxalyl chloride. 1-Alkyl(or phenyl)-3-(1,1,3-trioxo-1,3-dihydro-1 -benzo[d]isothiazol-2-ylmethyl)-imidazolidine-2,4,5-trione 5 and 1-alkyl(or phenyl)-2-thioxo- 3-(1,1,3-trioxo-1,3-dihydro-1 -benzo-[d]isothiazol-2-ylmethyl)-imidazolidine-4,5-dione 12 were obtained by means of 4 reaction steps involved the reaction of 1-methyl-urea(or 1-methylthiourea) and oxalyl chloride.