Journal of Fluorine Chemistry p. 359 - 363 (1990)
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Zibarev, Andrey V.
Miller, Alexey O.
1-(4-X-Tetrafluorophenyl)-3-trimethylsilyl-1,3-diaza-2-thiaallenes (X= H, CH3, Br, F, CF3) treated with CsF in acetonitrile or THF cyclized to 6-X-4,5,7-trifluoro-2,1,3-benzothiadiazoles whose reduction led to the corresponding 1,2-diaminobenzenes.Cyclization of the latter with SeCl4 gave 6-X-4,5,7-trifluoro-2,1,3-benzoselenadiazoles.
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