Abstract
Abstract10bHâ6âOxaâ1âthiaâ3a,5âdiazaacephenanthrylenes can be easily obtained by a sodium hydrogen carbonate catalyzed anionic domino reaction of thiazolium salts with salicylic aldehydes. It is presumed that the domino sequence includes Kröhnke condensation, nucleophilic cyclization, and ANRORC (addition of nucleophile/ring opening/ring closure) steps. To the best of our knowledge, this is a first example of a multistep anionic domino reaction incorporating an ANRORC transformation. The initial generality of the method is demonstrated by using 3âhydroxypyridineâ2âcarbaldehyde as a carbonyl component.
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