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Publikováno v:
The Journal of Organic Chemistry. 56:4494-4498
The transannular cyclopropanation of a keto carbene generated by Rh 2 (OAc) 4 catalysis on a bicyclic dihydropyran nucleus provided a key oxatricyclic ketone intermediate for the synthesis of the [6.6] spirocyclic ring construction. Selective fragmen