Highly efficient biphasic ozonolysis of alkenes using a high-throughput film-shear flow reactor
作者:Alexander J. Kendall、Justin T. Barry、Daniel T. Seidenkranz、Ajay Ryerson、Colin Hiatt、Chase A. Salazar、Dillon J. Bryant、David R. Tyler
DOI:10.1016/j.tetlet.2016.02.042
日期:2016.3
A new method for ozonolysis of alkenes using a continuous flow film-shear reactor was developed. The reactor uses a shearing microfluidic mixing chamber to provide biphasic mixing of an organic phase and aqueous phase with ozone gas. The H2O acts as an in situ reducing agent for the carbonyl oxide intermediate, providing ketones and aldehydes directly from the reaction mixture. Flow rates of up to
Ozonolysis reactions of a series of cyclic olefins 1 in the presence of carbonyl compounds 6 provided the corresponding cross-ozonides 42. Further reactions of ozonides 42 with the independently prepared carbonyloxide +CH2-OO− gave diozonides of structure 43. All of the newozonides have been isolated as pure substances and characterized by their 1H- and 13C-NMR spectra.
The synthesis of novel 3,4-dihydro-1,2,5,7,4-tetroxazocine derivatives via extended [3 + 3 + 2] cycloaddition reactions between a carbonyl oxide, a nitrone and an aldehyde
作者:Syuzo Satake、Yoshihiro Ushigoe、Masatomo Nojima、Kevin J. McCullough
DOI:10.1039/c39950001469
日期:——
Ozonolysis of acenaphthylene in the presence of a nitrone2 yields the corresponding polycyclic peroxide 5 containing the novel dihydro-1,2,5,7,4-tetroxazocine ring system; the structure of the crystalline adduct 5a has been unambiguously determined by X-ray crystallographic analysis.