In this work, a method for obtaining heterocyclic compounds from intramolecular nucleophiles was developed for propargylsilanes containing 1. In their reaction with electrophiles (Br+, I+, H+) vinyl cation 2 is formed, which further, as a result of migration of 1,2-silyl groups, they form a more stable allyl cation 3 [1], which, depending on the nucleophiles groups (G) and reaction conditions can cyclize to form one of compounds 6, 8 or 12 according to Scheme 1. The obtained products can serve as building blocks in the synthesis of biologically active compounds [2-3]. 6 functionalized propargylsilanes 1 were synthesized and their cyclization attempts were made. Cyclization reactions were performed at different temperatures (from ‒40 °C to 100 °C) in polar aprotic solvents (MeCN, DCM, THF), using halogen cation sources (NBS, NIS) or acid (HNTf2) as an electrophile in catalytic quantities. Depending on the synthesis route, the reaction takes from 5 minutes to 2 days. It was observed that the reactions that would lead to the formation of four-membered heterocycles failed to be realized, but two five-membered heterocycles - 4,5-dihydro-1,2-isoxazole derivatives were obtained. On the other hand, six-membered formation of heterocycles can be observed by both NMR and GC/MS results, but so far effective isolation and purification methods has not yet been found for the compounds.