الفهرس 
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Abstract
2- thiohydantoin reacts with primary amines ( methyl-, n- propyl- , isopropyl , n- butyl , and benzylamines ) to give ( - thioureido - n - alkyl- acetamides. It reacts also with piperidine and morpholine to give(- thioureido-n- piperidinoand- thioureido -n- morpholinoacetamide respectively. 5- arylidene -2-thiohydantoins react with primary amines ( methyl , n- propyl- , n- butyl- , and benzyl ) to give the corresponding 2- n- alkyl - imino 5- arylidene hydantoin. They react with piperidine and morpholine. Mannich condensation with 2- thiohydantoin is investigated . The structure of the above products is confirmed by studyinG their infrared spectra .