Abstract
Stereochemical communication in homopropargylation and homoallylation of aldehydes was achieved by the Ti-O temporary linker strategy. Propargylic and allylic alcohol derivatives were employed as convenient pronucleophiles, obviating prefabrication of propargylation/allylation reagents. It was surprising that 1,6-diastereoselectivity was affected by not only the Grignard reagent but also the reaction solvent.
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