A new synthetic path to peri-naphthisoxazoles by oxidative intramolecular cyclization of some β,γ-unsaturated oximes
Abstract
Some β,γ-unsaturated oximes undergo an unprecedented intramolecular cycloaddition to an aryl group to afford peri-naphthisoxazoles when they are irradiated in the presence of PhI(OAc)2 and I2 or HgO and I2 in benzene or by thermal reaction with NaOCl and Et3N in CH2Cl2.
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