Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 18, Issue 7, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202300019
Keywords
halogen bonding; iodocyclization; amidophosphate catalyst; chiral Lewis base; polyene cyclization
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A chiral amidophosphate-N-iodosuccinimide cooperative catalysis has been developed for the site-, diastereo-, and enantioselective iodocyclization of 2-geranylarenols with molecular iodine to give iodo-containing polycyclic compounds with good selectivity. The catalytic system involves the formation of a reactive chiral iodonium species through dual halogen-bonding interactions with a chiral Lewis base and Lewis acid. The bulky 3,3'-substituents of the chiral BINOL-derived amidophosphate are crucial for inducing site-selective iodination at the less-hindered terminal alkenyl moiety of 2-geranylarenols.
A chiral amidophosphate-N-iodosuccinimide cooperative catalysis has been developed for the site-, diastereo-, and enantioselective iodocyclization of 2-geranylarenols with molecular iodine to give the corresponding iodo-containing polycyclic compounds with good levels of selectivity. This is the first example of a catalytic enantioselective iodocarbocyclization. A reactive chiral iodonium species is generated from molecular iodine via the dual halogen-bonding interactions with a chiral Lewis base and Lewis acid. The sterically demanding 3,3 '-substituents of the chiral BINOL-derived amidophosphate are critical to induce the site-selective iodination at the less-hindered terminal alkenyl moiety of 2-geranylarenols.
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