报道了通过Pd- t BuONO共催化邻烯丙基苯胺的好氧环异构化可规模化和实用地合成官能化的吲哚。使用分子氧作为末端氧化剂,以中等至良好的产率制备了一系列取代的吲哚。避免使用有害的氧化剂,重金属助催化剂和高沸点溶剂(例如DMF和DMSO),可使该方法应用于药物合成。吲哚美辛的实用克级合成证明了其应用潜力。
Synthesis of Functionalized Indoles via Palladium-Catalyzed Aerobic Cycloisomerization of <i>o</i>-Allylanilines Using Organic Redox Cocatalyst
作者:Xiao-Shan Ning、Mei-Mei Wang、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.joc.8b01999
日期:2018.11.2
A scalable and practical synthesis of functionalized indoles via Pd-tBuONO cocatalyzed aerobic cycloisomerization of o-allylanilines is reported. Using molecular oxygen as a terminal oxidant, a series of substituted indoles were prepared in moderate to good yields. The avoidance of hazardous oxidants, heavy-metal cocatalysts, and high boiling point solvents such as DMF and DMSO enables this method
报道了通过Pd- t BuONO共催化邻烯丙基苯胺的好氧环异构化可规模化和实用地合成官能化的吲哚。使用分子氧作为末端氧化剂,以中等至良好的产率制备了一系列取代的吲哚。避免使用有害的氧化剂,重金属助催化剂和高沸点溶剂(例如DMF和DMSO),可使该方法应用于药物合成。吲哚美辛的实用克级合成证明了其应用潜力。
Indomethacin Analogues that Enhance Doxorubicin Cytotoxicity in Multidrug Resistant Cells without Cox Inhibitory Activity
Conformationally restricted indomethacin analogues were designed and prepared from the corresponding 2-substituted indoles, which were synthesized by a one-pot isomerization/enamide-ene metathesis as the key reaction. Conformational analysis by calculations, NMR studies, and X-ray crystallography suggested that these analogues were conformationally restricted in the s-cis or the s-trans form due to the 2-substituent as expected. Their biological activities on cyclooxygenase-1 (COX-1) inhibition, cyclooxygenase-2 (COX-2) inhibition, and modulation of MRP-1-mediated multidrug resistance (MDR) are described. Some of these indomethacin analogues enhanced doxorubicin cytotoxicity, although they do not have any COX inhibitory activity, which suggests that the MDR-modulating effect of an NSAID can be unassociated with its COX-inhibitory activity. This may be an entry into the combination chemotherapy of doxorubicin with a MDR modulator.