Cascade C-H Annulation of Aldoximes with Alkynes Using O2 as the Sole Oxidant: One-Pot Access to Multisubstituted Protoberberine Skeletons.
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DOI: 10.1021/acs.orglett.6b03772
Abstract: A cascade double C-H annulation of aldoximes with alkynes to produce benz[a]acridizinium salts is developed by using a simple catalytic system of [Cp*Rh(OAc)2]2 in the presence of Zn(OTf)2 with oxygen as the sole oxidant. In… read more here.
Keywords: aldoximes alkynes; sole oxidant; annulation aldoximes; pot access ... See more keywords