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Illylic alcohol at 15 to give the corresponding side chain ketone, 48. Reduction of the ketone—as the Ms-trimethylsilyl et hcr-affords largely the 15a hydroxy compound (7) . In effect then, this sequence (47-±7) serves as a means of inverting the Monocyclic Alicyclic Compounds 34 configuration at 15 from that found in the sea to that required for dinoprost (7). CO 2 CH 3 CO 2 CH 3 CO 2 CH 3 CO 2 CH 3 CO 2 CH 3 CO 2 CH 3 OH 50 CO 2 CH 3 OH 48 51 CO 2 H HO OH Prostaglandins 35 In a variation on this scheme, the 15 acetate is first saponified and the resulting alcohol converted to the methanesulfonate (49).

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Account of microwave irradiation for accelerating organic reactions by El Sayed H. El Ashry and Ahmed A. Kassem

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