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。
Anion exchange: a novel way of preparing hierarchical porous structure in poly(ionic liquid)s
The exchange of bulky salicylate and its dimers/clusters in PILs by other smaller anions increased specific surface area and fabricated a hierarchical porous structure.
Palladium‐Catalyzed Synthesis of Carbazoles by Perester
作者:Li He、Yongjun Xu
DOI:10.1002/adsc.202200419
日期:2022.7.19
An intramolecular C−H amination for the synthesis of carbazoles with a Pd(II)/TBPB system has been developed. This catalytic amination process forms the carbazole products in good to excellent yields. It is noteworthy that this method implied the advantages of the catalytic mode involving perester with transition metal catalyst in the activation of inert C−H bonds. In addition, the transformation performs
Anodic Dehydrogenative Aromatization of Tetrahydrocarbazoles Leading to Carbazoles
作者:Eisuke Sato、Ayaka Yukiue、Koichi Mitsudo、Seiji Suga
DOI:10.1021/acs.orglett.3c01914
日期:2023.7.21
Anodic oxidation-promoted aromatization of 1,2,3,4-tetrahydrocarbazoles was achieved. Nitrogen-protected tetrahydrocarbazoles could be converted to the corresponding carbazoles with the use of bromide as a mediator. LiBr, an inexpensive bromide source, allowed for efficient transformation in the presence of AcOH.
[EN] SILICONE COMPOSITIONS<br/>[FR] COMPOSITIONS DE SILICONE
申请人:SAINT GOBAIN PERFORMANCE PLASTICS CORP
公开号:WO2019068093A1
公开(公告)日:2019-04-04
This disclosure relates to polymerizabie silicone compositions, methods for polymerizing such compositions, and to polymerized silicone compositions formed thereby. In one embodiment, a polymerizabie composition includes one or more first organosiloxanes or organosilanes, each comprising a plurality of silicon hydride functional groups, one or more second organosiloxanes or organosilanes, each comprising a plurality of reactive heterocycloalkyl functional groups; and one or more third organosiloxanes or organosilanes, each comprising at least about one silicon hydride functional group and at least about one reactive heterocycloalkyl functional group; and an effective amount of a borane catalyst, present, for example, in an amount within the range of 0.0005 wt% to about 10 wt%, wherein the ratio of reactive heterocycloalkyl functional groups to reactive silicon hydride functional groups in the composition is in the range of 1:5 to 5:1. The compositions and methods are useful, for example, in adhesive and sealing applications.