An imine-linked (+)-syn-benzotricamphor derivative gives access to chiral unimolecular cages exhibiting internal cavities of new shapes and volumes. One of these hosts hydrocarbon gases at low temperatures in solution through CH-pi attractive interactions. No encapsulation is observed when the cage structure is too narrow or too large for the guest.
Cycloaddition reactions O 0070 1-Bromo-2-(diphenylphosphinoyl)ethyne and 1-Bromo-2-(p-tolylsulfinyl)ethyne: Versatile Reagents Eventually Leading to Benzocyclotrimers. -Two different dienophiles (I) and (VI) are described for the synthesis of Diels-Alder cycloadducts. Products (III) and (VII) are converted to the stannyl derivative (V) as potential precursor of hexasubstituted benzene-type cyclotrimers as useful scaffolds in supra molecular processes. -(PADOVAN, P.; TARTAGGIA, S.; LORENZON, S.; ROSSO, E.; ZONTA, C.; DE LUCCHI, O.; FABRIS*, F.; Tetrahedron Lett. 50 (2009) 17, 1973-1976; Dip. Chim., Univ. Ca'Foscari, I-30123 Venezia, Italy; Eng.) -Mais 32-028
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