Radical Cyclization Approach to Spirocyclohexadienones
摘要:
Cyclization of an aryl radical at the ipso position of a p-O-aryl-substituted acetamide or benzamide generates oxindoles or quinolones bearing spirocyclohexadienone rings. This versatile reaction is applied to formal syntheses of the vasopressin inhibitor SR121463A and aza-galanthamine.
Synthesis of 2-Indolylphosphines by Palladium-Catalyzed Annulation of 1-Alkynylphosphine Sulfides with 2-Iodoanilines
作者:Azusa Kondoh、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1021/ol1001544
日期:2010.4.2
Palladium-catalyzed annulation of 1-alkynylphosphine sulfides with 2-iodoanilines followed by desulfidation affords 3-substituted 2-indolylphosphines. This annulation/desulfidation sequential protocol offers a conceptually new approach to bulky heteroarylphosphines.
their prevalence in nature and their broad utility in pharmaceutical industry. Reported herein is an unprecedented noble‐metal‐ and oxidant‐free electrochemical method for the coupling of (hetero)arylamines with tethered alkynes to synthesize highly functionalized indoles, as well as the more challenging azaindoles.
Silver-catalyzed one-pot cyclization/fluorination of 2-alkynylanilines: highly efficient synthesis of structurally diverse fluorinated indole derivatives
作者:Lei Yang、Yuanhong Ma、Feijie Song、Jingsong You
DOI:10.1039/c3cc49851d
日期:——
Highly efficient approaches to obtain structurally diverse fluorinated indolederivatives have been realized through the Ag-catalyzed one-pot cyclization/fluorination of 2-alkynylanilines in the presence of NFSI or Selectfluor.
Copper-Catalyzed Intramolecular Oxidative C(sp<sup>3</sup>)-H Amidation of 2-Aminoacetophenones: Efficient Synthesis of Indoline-2,3-diones
作者:Jinbo Huang、Tingting Mao、Qiang Zhu
DOI:10.1002/ejoc.201400012
日期:2014.5
An efficient synthesis of diverse indoline-2,3-diones from 2-aminoacetophenones through copper-catalyzedintramolecular C(sp3)–H amidation is developed. The reaction proceeds in DMSO by using O2 as the sole oxidant to provide the desired products in moderate to good yields.