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Ti-Catalyzed Reformatsky-Type Coupling between -Halo Ketones and Aldehydes
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We describe the first Ti-catalyzed Reformatsky-type couplingbetween -halo ketones and aldehydes. The reaction affords-hydroxy ketones under mild, neutral conditions compatiblewith ketones and other electrophiles. The catalytic cyclepossibly proceeds via bis(cyclopentadienyl)titanium enolates.

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