some 2-iminothiazolidin-4-ones have been synthesized by the reaction of dialkyl acetylenedicarboxylates with thiosemicarbazones. the reaction was performed in the presence of 10 mol% of triphenylphosphine and tetrabutylammonium bromide as a phase transfer catalyst in water as a green solvent. all the synthesized compounds were characterized by their physical and spectral data.

The main problem of this research is the Juridical Analysis Land Ownership Disputes in Takalar Regency. This descriptive using qualitative data, data obtained through field studies (Field Research). so that collection method sourced from informant both Plaintiff and Defendant, District Court, government case Lakatong Village. Data was collected methods observation, interviews documentation. Fur...

The chiral bicyclic lactam (2) derived from levulinic acid and (S)-valinol is sequentially alkylated and then cleaved to 2,2-dialkyl levulinaldehyde (5) which is cyclized to the title products (2) in > 99% ee.

The reaction kinetics among isoquinoline, dimethyl acetylenedicarboxylate, and indole (as NH-acid) were investigated using ultraviolet (UV) spectrophotometry. rate equation was obtained, the dependence of on different reactants determined, overall constant ( k ov ) calculated. By studying effects solvent, temperature, concentration rate, some useful information obtained. A logical mechanism con...