Abstract:Photochemical decomposition of the diazoketone (I) gives rise to the formation of the well known keto Carbene ‐ oxirene equilibrium (II)‐(IV) from which not only the product of the Wolff rearrangement, the ketene (XII) can be derived [as its EtOH addition product, the ester (XIII)] but also the intramolecular addition product (VIII) [isolated in the rearranged form (IX) (space group P21/c with Z=4)] and the insertion products (X) [which exists as the enol (XI) as expected] and (V), which is in equilibrium with… Show more
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