Rad, Javad AmeriJarrahpour, AliasgharErsanli, Cem CuneytAtioglu, ZelihaAkkurt, MehmetTuros, Edward2025-03-232025-03-2320170040-4020https://doi.org/10.1016/j.tet.2017.01.009https://hdl.handle.net/11486/6003This article reports the synthesis of some new spiro-beta-lactams bearing an indeno[1,2-b]quinoxaline ring system, prepared by a [2 + 2] cycloaddition of ketenes with imines derived from 11-H-indeno[1,2-b] quinoxalin-11-one. The structures of newly synthesized spiro-beta-lactams 2a-i and 3a-i were characterized by FT-IR, H-1 NMR, C-13 NMR, mass spectrometry and elemental analyses. The relative stereochemistry of spiro-beta-lactams 2a and 3a was determined unequivocally by X-ray crystallographic studies. (C) 2017 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccessindeno[1,2-b]quinoxalinStaudinger reactionbeta-lactamsSpiroArticle7381135114210.1016/j.tet.2017.01.0092-s2.0-85009804057Q3WOS:000394194400008Q2