Journal
ORGANIC LETTERS
Volume 5, Issue 14, Pages 2535-2538Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol034806q
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[GRAPHIC] A ruthenium porphyrin-catalyzed stereoselective intramolecular carbenoid C-H insertion is described. Using [Ru-II(TTP)(CO)] as catalyst, aryl tosylhydrazones are converted to 2,3-dihydrobenzofurans, 2,3-dihydroindoles, and beta-lactams in good yields and remarkable cis selectivity (up to 99%). Enantioselective synthesis of 2,3-dihydrobenzofurans is also achieved with [Ru-II(D-4-Por*)(CO)] as catalyst, and up to 96% ee is attained.
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