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The acetate 13a and methoxyacetate 13b of (E)-3-hydroxy-4-(arylmethylidene)cyclodeca-1,5-diyne possessing a free hydroxy group underwent an allylic rearrangement at 20 o C in the presence of catalytic Eu(fod) 3 to give the enediyne 14 in excellent yields. In contrast, the acetate 10a with a silyloxy group failed to rearrange under the same conditions. These results demonstrated that...
A general and facile synthesis of the 3-substituted 10-membered ring enediynes 18-22 from the aldehydes 8 and 15 has been established by utilizing the intramolecular Nozaki-Hiyama-Kishi reaction and the lanthanide(III)-catalyzed rearrangement of allylic alkoxyacetates as the key steps. This work provides ready access to the (E)-3-acyloxy-4-(arylmethylidene)cyclodeca-1,5-diynes, which can be converted...
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