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Organochalcogenides have been used as pseudo-halides in some catalytic reaction. For recent examples.
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Since Pd species 23 is divalent, 23 may prefer to add to the more electron-rich inner double bond, i.e., as suggested by the editor, acylpalladation at the inner double bond followed by formation of π-allylpalladium intermediate 25' leading to 25 is also a possible pathway
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Since Pd species 23 is divalent, 23 may prefer to add to the more electron-rich inner double bond, i.e., as suggested by the editor, acylpalladation at the inner double bond followed by formation of π-allylpalladium intermediate 25' leading to 25 is also a possible pathway.
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