1369345-36-7Relevant academic research and scientific papers
The unexpected conversion of a thiophene ring into a pyrrole ring via a putative nitrene intermediate
Harrington, Ross W.,Stanforth, Stephen P.
, p. 2111 - 2113 (2012)
Triethylphosphite induced reductive cyclisation of 1-(2-nitrophenyl)-3,5- di(2-thienyl)pyrazole 6 afforded the expected 1,3-di(2-thienyl)pyrazolo[1,2-a] benzotriazole 7 (14%) together with an unexpected product which was shown to be a 2-(2-thienyl)pyrazolo[1,5-a]pyrrolo[2,1-c]quinoxaline 8 derivative (27%). A mechanism for the extrusion of sulfur during the transformation of heterocycle 6 into product 8 is proposed.
