Aryl iodides tethered to dehydroalanine units by two to four methylene groups undergo intramolecular Heck reactions under anhydrous Jeffery conditions to give 7-, 8- and 9-membered rings by the endo-mode of cyclisation; under harsher conditions, a palladium intermediate formed by the exo-mode of cyclisation is expressed as reduced products.
S. E. Gibson (née Thomas) and R. J. Middleton, J. Chem. Soc., Chem. Commun., 1995, 1743 DOI: 10.1039/C39950001743
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