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A New Route to Seven-and Eight-Membered Carbocycles.-Several annulated carbocycles are prepared by a facile and efficient three-step sequence involving intramolecular Kulinkovich cyclopropanation of ω-vinyl esters followed by oxidation and dehydrochlorination. Seven-membered cyclizations of vinyl esters such as (X) proceed less efficient. This problem can be overcome by the use of corresponding amides such as (XIII) and (XV). The hitherto unknown ring opening of the products thus obtained is under investigation. -(U, J. S.; LEE, J.; CHA, J. K.; Tetrahedron Lett. 38
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