REGIOSELECTIVE RING EXPANSION OF 3,3-DIMETHYLAZIRIDIN-2-CARBOXYLATE AND A PHOTOCHEMICAL ENTRY TO THE PENEM NUCLEUS

[摘要]：3,3-Dimethylaziridin-2-carboxylates undergo ring expansion with thiocyanates to give a 4,4-dimethylthiazolidin-5-carboxylate as the major product. Irradiation of a N-cysteinyl-3,3-dimethylaziridin-2-carboxylate was found to give a penem in low yield, presumably via a transient thioaldehyde which added across the aziridine N-C(3) bond.

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