Dias Luiz C, de Oliveira Luciana G, Vilcachagua Janaína D, Nigsch Florian
Instituto de Química, Universidade Estadual de Campinas, UNICAMP, C. P. 6154 Campinas, SP, Brazil.
J Org Chem. 2005 Mar 18;70(6):2225-34. doi: 10.1021/jo047732k.
[structure: see text] The total synthesis of (+)-crocacin D is described. The convergent asymmetric synthesis relies on the use of a Stille cross-coupling between an (E)-vinyl stannane with an (E)-vinyl iodide to establish the (E,E)-dienamide moiety followed by a mild and efficient copper-catalyzed coupling between (+)-crocacin C and a (Z)-vinyl iodide to establish the challenging (Z)-enamide function.
[结构:见正文] 描述了(+)-番红花酸D的全合成。该汇聚式不对称合成依赖于使用(E)-乙烯基锡烷与(E)-乙烯基碘之间的Stille交叉偶联来构建(E,E)-二烯酰胺部分,随后进行(+)-番红花酸C与(Z)-乙烯基碘之间温和且高效的铜催化偶联以构建具有挑战性的(Z)-烯酰胺官能团。