Enantioselective Synthesis of Spiroindolines via Cascade Isomerization/Spirocyclization/Dearomatization Reaction
作者:Zhiqiang Pan、Yuchang Liu、Fengchi Hu、Qinglong Liu、Wenbin Shang、Xu Ji、Chengfeng Xia
DOI:10.1021/acs.orglett.0c00181
日期:2020.2.21
with 2,7-diazaspiro[4.4]nonane exists in various structurally intricate and biologically active monoterpene indole alkaloids. A catalytic asymmetric cascade enamine isomerization/spirocyclization/dearomatization succession to construct the spiroindoline was developed, which employed the indolyl dihydropyridine as a substrate under catalysis of the chiral phosphoric acid. This cascade reaction provided
具有2,7-二氮杂螺[4.4]壬烷的螺二氢吲哚骨架存在于各种结构复杂且具有生物活性的单萜吲哚生物碱中。开发了一种催化不对称的级联烯胺异构化/螺环化/脱芳香化序列以构建螺二氢吲哚,该化合物在手性磷酸的催化下,以吲哚基二氢吡啶为底物。该级联反应以非对映选择性和对映体选择性的方式提供了各种螺二氢吲哚。