Efficient synthesis of carbazolespirooxindole skeletons via asymmetric Diels–Alder reaction of 3-vinylindoles and methyleneindolinones
作者:Haifeng Zheng、Peng He、Yangbin Liu、Yulong Zhang、Xiaohua Liu、Lili Lin、Xiaoming Feng
DOI:10.1039/c4cc03135k
日期:——
A highly efficient catalytic asymmetric Diels-Alder reaction between 3-vinylindoles and methyleneindolinones has been achieved using chiral N,N'-dioxide-Ni(II) complexes as the catalysts. A wide variety of substrates were readily tolerated, generating exclusively the corresponding exo-carbazolespirooxindole derivatives in excellent yields with high enantiomeric excesses (up to 98% yield, >99 : 1 d
使用手性N,N'-二氧化物-Ni(II)配合物作为催化剂,可以实现3-乙烯基吲哚和亚甲基吲哚满酮之间的高效催化不对称Diels-Alder反应。容易耐受多种底物,在温和的反应条件下,以优异的收率仅产生具有高对映体过量(高达98%收率,> 99:1 dr和98%ee)的优异产率的相应外-咔唑螺氧并吲哚衍生物。