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Publikováno v:
The Journal of organic chemistry. 68(19)
Bromine−lithium exchange of the mono- and dibromophenothiazines 1 and 3a regiospecifically furnishes upon electrophilic trapping with iodine the iodo- and diiodophenothiazines 2, 3b, and 3d in excellent yield. The 3-bromo-7-iodophenothiazine 3d can