It is shown that allylethynyldimethylcarbinol and its derivatives undergo the heterodiene condensation with acrolein and crotonic aldehyde on double bond with formation of mono- and bis-adducts. It has been established that the tertiary acetylene alcohols of dihydropyrane series in the presence of alkali are splitted with formation of acetone and heterocyclic derivatives with the terminal acetylene bond. It has been revealed that glycidyl ethers undergoing the reactions with the primary diamines at 50⁰C form the corresponding diaminoalcohols which under action of urea (175–180⁰C) form acetylene derivatives of imidazolidinone