Polycyclic nitrogen compounds. Part iii. Synthesis of 3,3a‐dihydrothiazolo[3,4‐α]quinoxalin‐4‐ones
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Journal of Heterocyclic Chemistry
New tricyclic quinoxalinone skeletons with bridge‐head nitrogen atoms and containing sulphur in a fully‐reduced five‐membered ring C were obtained. 3,3a‐Dihydrothiazolo[3,4‐α]quinoxalin‐4‐ones I‐III were prepared by metal‐acid reductive cyclisation of N‐(nitrophenyl)‐ and N‐(dinitrophenyl)thiazolidine‐4‐carboxylic acids IVa,b,c. Attempts to obtain the skeleton by selective hydrogen transfer reductive cyclisation of the corresponding esters Va,b,c were unsuccessful.
Research Subject Categories::NATURAL SCIENCES::Chemistry::Organic chemistry , tricyclic quinoxalinone , nitrogen atoms , five‐membered ring , cyclisation , hydrogen transfer
Adegoke, E. A., & Alo, B. (1983). Polycyclic nitrogen compounds. Part iii. Synthesis of 3, 3a‐dihydrothiazolo [3, 4‐α] quinoxalin‐4‐ones. Journal of heterocyclic chemistry, 20(6), 1513-1516.