Reaction of methyl 2-siloxycyclopropanecarboxylate 4 with TiCl4 provides the unique titanoxycyclpropane whose structure could be elucidated by means of NMR-spectroscopy. Its additions to aldehydes and acetophenone occur with high stereoselectivity to afford homoaldol products like . These intermediates can further be transformed to highlysubstituted tetrahydrofuran derivatives by activation with BF3-OEt2