Author/Authors :
Pol?vkov?، نويسنده , , Kate?ina and ?im?nov?، نويسنده , , Markéta and Budka، نويسنده , , Jan and Cu??nov?، نويسنده , , Petra and C?sa?ov?، نويسنده , , Ivana and Lhot?k، نويسنده , , Pavel، نويسنده ,
Abstract :
Treatment of the monospirodienone derivative of thiacalix[4]arene with various acidic agents (HCl and HBr) results in rearrangement of the thiacalixarene skeleton leading to the formation of a phenoxanthiin derivative in high yields (up to 80%). The structure of the unexpected product is confirmed using 1H and 13C NMR spectroscopy, and X-ray crystallography.
