The author of 《Synthesis, Electronic Spectroscopy, and Photochemistry of Methacrolein Oxide: A Four-Carbon Unsaturated Criegee Intermediate from Isoprene Ozonolysis》 were Vansco, Michael F.; Marchetti, Barbara; Trongsiriwat, Nisalak; Bhagde, Trisha; Wang, Guanghan; Walsh, Patrick J.; Klippenstein, Stephen J.; Lester, Marsha I.. And the article was published in Journal of the American Chemical Society in 2019. Synthetic Route of C8H14O4 The author mentioned the following in the article:
Ozonolysis of isoprene, a most abundant volatile organic compound in the Earth atm., generates the four-carbon unsaturated, methacrolein oxide (MACR-oxide), Criegee intermediate. Initial laboratory synthesis and direct detection of MACR-oxide was achieved by reaction of photolytically-generated, resonance-stabilized iodoalkene radicals with O. MACR-oxide was characterized on its first π* ← π electronic transition using a ground-state depletion method. MACR-oxide exhibited a broad UV-vis spectrum peak at 380 nm with weak oscillatory structure at long wavelengths ascribed to vibrational resonances. Complementary theory predicted two strong π* ← π transitions from extended conjugation across MACR-oxide with overlapping contributions from its four conformers. Electronic promotion to the 11ππ* state agreed well with exptl. data and resulted in non-adiabatic coupling and prompt release of O 1D products observed as anisotropic velocity-map images. This UV-visible detection scheme enables the study of its unimol. and bimol. reactions under thermal conditions relevant to the atm. In the experiment, the researchers used Diethyl 2-methylmalonate(cas: 609-08-5Synthetic Route of C8H14O4)
Diethyl 2-methylmalonate(cas: 609-08-5) belongs to aliphatic hydrocarbons. Aliphatic hydrocarbons belong to the most abundant fraction in crude oil. Aliphatics molecules are linear or branched open-chain structures such as n-alkanes, isoalkanes, cycloalkanes (naphthenes), terpenes and steranes.Synthetic Route of C8H14O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics