Mechanistic alternatives in Lewis acid-catalyzed acyl halidealdehyde cyclocondensations
1999
Abstract An investigation of the operative reaction mechanisms in Lewis acid-catalyzed acyl halidealdehyde cyclocondensations is presented. Aluminum-based catalysts promote cyclocondensation via a ketene-dependent reaction pathway while acyl halide enolates are implicated as reactive intermediates in Ti(IV)-catalyzed reactions.
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