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Reaction of vinyl Grignard reagents with a-halo ketones. Vinylmagnesium bromide or vinyllithium (2 equivalents) reacts with a-halocycloalkanones to give 1,2-divinylcycloalkanols, used in oxy-Cope rearrangements for synthesis of large ring ketones (c/ 7, 302-303 8, 412 414).8 Examples ... [Pg.190]

See other pages where Oxy-Cope rearrangements for synthesis is mentioned: [Pg.102] [Pg.108]