TY JOUR TI Unusual transformations of monopropargyl esters 2,3- and 1,3-butanediols KW cyclohydration KW monopropargyl esters KW heterocyclization KW butanediol KW dioxane KW t-BuOH KW NaOH KW alcohol KW acetylene ethers KW hydration reaction KW acrolein JO Oil and gas technologies and environmental safety AU Mammadov, E.. AU Guliyeva, S.. PY 2026 IS 2026 PB Astrakhan State Technical University