[reaction: see text] In connection with the known diyne-ene [2 + 2 + 2] cycloaddition reactions mediated by titanium aryloxides, the ability of titanium alkoxides to promote coupling of a titanacyclopentadiene with an alkene has been assessed for the isomerization-free preparation of 1,3-cyclohexadienes. The successful cycloaddition by titanium alkoxides is predicated on the use of homoallylic alcohols as the olefin component. With secondary homoallylic alcohols, high 1,3-diastereoselectivity is observed, which lends itself to enantioselective preparation of functionalized 1,3-cyclohexadienes.
Calix[4]arene Dibenzocrown Ethers as CesiumIonophore -[synthesis and conformation of the title calixarene crown ethers]. -(KIM, J. S.; CHO, M. H.; YU, I. Y.; PANG, J. H.; KIM, E. T.; SUH, I. H.; OH, M. R.; RA, D. Y.; CHO, N. S.; Bull. Korean Chem.
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