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Publikováno v:
Tetrahedron Letters
Tetrahedron Letters, Elsevier, 2014, 55 (17), pp.2849-2852. ⟨10.1016/j.tetlet.2014.03.081⟩
Tetrahedron Letters, Elsevier, 2014, 55 (17), pp.2849-2852. ⟨10.1016/j.tetlet.2014.03.081⟩
Highly strained pentacyclic bis-lactones can be obtained by an unusual Co(I) catalyzed [2+2+2] cycloaddition of an yne–ene–yne diester substrate. These bis-lactones can be further transformed into tetraaryl N-hydroxyphthalimides which are potenti