Synthesis and structure of spirooxazines of the thieno[3,2-b]pyrroline series

A series of spironaphthoxazines based on thieno[3,2-b]pyrroline derivatives were synthesized and their structures were studied by Н NMR spectroscopy, mass spectrometry, and X-ray diffraction. Comparative analysis of the spatial structures of spirooxazines of the thieno[3,2b]pyrroline and indoline series was performed.