D. Gamenara et al., Hetero Diels-Alder adduct formation between nitrosobenzene and tetra-methyl purpurogallin and its retro-Diels-Alder reaction, J BRAZ CHEM, 12(4), 2001, pp. 489-492
An efficient synthesis of a Diels-Alder adduct between purpurogallin tetram
ethyl ether (TMPG) and nitrosobenzene (NOB) is reported. The thermal decomp
osition kinetics of the adduct, which follows a retro-Diels-Alder mechanism
, was studied using H-1-NMR spectroscopy.