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Addition of dibromocarbene (bromoform/NaOH) gives the dibromocyclopropane in good yield: Tetrahedron Lett., 26, 6353 (1985). Reaction with propargyl bromides in the presence of zinc leads to cyclopentenes: Synthesis, 150 (1978)./n
Reaction with crotyltriisopropoxytitanium produces the anti-adduct as the major product: J. Chem. Soc., Chem. Commun., 386 (1985):/n