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A series of electronically diverse imines were found to readily react with various donor–acceptor cyclopropyl acid chlorides, with complete regioselectivity, to form 1,3-oxazin-4-ones in moderate yields (25–48% over two steps). Select oxazinones underwent a base induced rearrangement to afford the corresponding cycloheptene-fused oxazinones in good yields (up to 70%).

Starting from 1-benzoyl or 1-acetylcyclopropane-1-carboxylic acid and a range of imines, the title compounds are synthesized in a high-yielding operationally simple and rapid manner.

Hoveyda—Grubbs catalyzed enyne ring-closing metathesis produces the diene (II) in good yields.

The synthesis of unsaturated and doubly unsaturated esters in only 2 steps is possible by the application of a radical xanthate transfer process from easily accessible and commercially available starting materials.

Treatment of a tethered N-(diphenylmethylene)glycinate-malonate derivative with [60]fullerene under Bingel conditions yielded an e-edge-[60]fullerenylmethanodihydropyrrole adduct in a regioselective manner. The regiochemical outcome was independent of the order of addition of either the N-(diphenylmethylene)glycinate or the malonate moieties. This new bis-adduct was also prepared in 13C-enriched form allowing for its unequivocal structural characterization by 2D INADEQUATE NMR experiments. Ring opening of the dihydropyrrole functionality of the bis-adducts under reductive conditions gave exclusively novel dihydromethano[60]fullerene derivatives. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)