2005

Hydroxylamine derivativesP 0050 Ene Reactions of Acyl Nitroso Intermediates with Alkenes and Their Halocycliza-

tion. — The title reactions, useful as a key step in natural product synthesis, are inves-tigated in the presence of different types of transition metal catalysts. Best results are obtained with substrates (VII) and (IV) in the presence of CuI. Product (VIIIb) is further halocylized to the oxazoles (IX) and (X). — (FAKHRUDDIN, A.; IWASA*, S.; NISHIYAMA, H.; TSUTSUMI, K.; Tetrahedron Lett. 45 (2004) 51, 9323-9326; Sch. Mater. Sci., Toyohashi Univ. Technol., Toyohashi, Aichi 441, Japan; Eng.) — Lindner

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