Synthesis of tetramic acid from Cbz-Gly-OH and use in organo catalyzed 1,4-aditions

Iz Cbz-zaščitenega glicina in Meldrumove kisline sem sintetizirala tetramsko kislino, ki sem jo nato uporabila kot izhodno spojino za pripravo njenih derivatov. Z reakcijo Michaelove adicije sem nanjo adirala trans-β-nitrostiren, pri tem pa sem uporabila dva različna organokatalizatorja, in sicer kiralnega in akiralnega. Produkta Michaelove adicije sem nato alkilirala z benzil bromidom in dobila končna produkta. Eden od njiju je nastal v obliki racemne zmesi, drugi pa je bil enantiomerno obogaten. Enantiomerni presežek slednjega sem določila s pomočjo metode HPLC.Tetramic acid was synthesized from Cbz-protected glycine and Meldrum\u27s acid. It was then used as a starting compound for the preparation of tetramic acid derivatives, starting with Michael addition of trans-β-nitrostyrene. Two different organocatalysts were used in this step: a chiral and an achiral one. The products of Michael addition were then alkylated with benzyl bromide and the final products were obtained. One of them was formed as a racemic mixture and the other one was enantiomerically enriched. The enantiomeric excess of the latter one was determined with the help of HPLC