89860-79-7Relevant articles and documents
Polycylic Nitrogen Compounds. Part III. Synthesis of 3,3a-Dihydrothiazoloquinoxalin-4-ones
Adegoke, E. A.,Alo, Babajide
, p. 1513 - 1516 (2007/10/02)
New tricyclic quinoxalinone skeletons with bridge-head nitrogen atoms and containing sulphur in a fully-reduced five-membered ring C were obtained. 3,3a-Dihydrothiazoloquinoxalin-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.