Novel Tetracyclic Spiro-1,2,4-trioxolanes (Ozonides): Synthesis and Mass-Spectrometry
The interaction of alicyclic 1,5-diketones containing 5,6,7-membered cycles, with 30% H<sub>2</sub>O<sub>2</sub> in ether or alcohol in the presence of boron etherate or strong mineral acids (HCl, H<sub>2</sub>SO<sub>4</sub>, HClO<sub>4</sub>) yields new tetracyclic spiro-1,2,4-trioxolans (ozonides). Mass spectrometry studies of these compounds under the APCI conditions showed that the MS2 spectra of the compounds, depending on the size of the cycle, have their own characteristic features of decay; this allows us to further identify such compounds from the mass spectrum.