Synthesis of fused tetracyclic spiroindoles via palladium-catalysed cascade cyclisation

Synthesis of fused tetracyclic spiroindoles via palladium-catalysed cascade cyclisation
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DOI:
10.1039/c3cc46511j
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发表时间:
2014-01-01
影响因子:
4.9
通讯作者:
Ohno, Hiroaki
Ohno, Hiroaki
中科院分区:
化学2区
文献类型:
--
作者:
Iwata, Akira;Inuki, Shinsuke;Ohno, Hiroaki

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开发了高效的钯催化级联环化反应以形成螺吲哚。在催化量的Pd-2(dba)(3)中心点CHCl_3/dppb和Cs_2CO_3存在下,在THF中用各种外部亲核试剂处理3-位带有炔丙基氯侧链的吲哚,以中等至良好的产率得到稠合四环螺吲哚。
Efficient palladium-catalysed cascade cyclisation to form spiroindoles is developed. Treatment of indoles bearing a propargyl chloride side chain at the 3-position with various external nucleophiles in the presence of a catalytic amount of Pd-2(dba)(3)center dot CHCl3/dppb and Cs2CO3 in THF gives fused tetracyclic spiroindoles in moderate to good yields.