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A versatile and selective method for the preparation of a-(2)-I-alkenyl ketones from P-keto benzyl esters has been developed by exploiting the three-step sequence of an improved Pinhey's alkynylation, semihydrogenation, and reductive debenzyloxycarbonylation.

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A convergent and practical synthesis of (+)-isocarbacyclin has been accomplished, incorporating novel methods for linking (Y and o appendages with a chiral bicyclo[3.3.0]octane nucleus.