Achieving functional group diversity in parallel synthesis: solution-phase synthesis of a library of ureas, carbamates, thiocarbamates, and amides using carbamoylimidazolium salts
作者:Justyna A. Grzyb、Robert A. Batey
DOI:10.1016/j.tetlet.2008.06.096
日期:2008.9
A convenient protocol for the parallelsolution-phasesynthesis of a library of thiocarbamates, ureas, carbamates, and amides from carbamoylimidazolium salts has been developed. The crystalline carbamoylimidazolium salts are readily synthesized from secondary amines, CDI and iodomethane, and act as stable carbamoylation reagents. A common set of reaction conditions and a straightforward non-chromatographic
MoS2 quantumdot stabilized on magnetical copper ferrite (CuFe2O4) was prepared. The structural and textural of the designed CuFe2O4/polydopamine (PDA)/MoS2 were characterized. The heterogeneous CuFe2O4/PDA/MoS2 catalytic system-driven direct α-hydromethylation of amidesusing methanol as a green and renewable C1 source and air as a sole oxidant under visiblelight irradiation has been established
制备了稳定在磁性铜铁氧体(CuFe 2 O 4 )上的MoS 2量子点。对所设计的CuFe 2 O 4 /聚多巴胺(PDA)/MoS 2的结构和织构进行了表征。异质CuFe 2 O 4 /PDA/MoS 2首次建立了在可见光照射下,使用甲醇作为绿色可再生C1源,空气作为唯一氧化剂,催化系统驱动的酰胺直接α-羟甲基化反应。以高产率获得了多种具有优异官能团耐受性的β-羟基酰胺衍生物。该光催化剂可以通过外部磁场回收并重复使用多次,而不会明显降低其催化活性。
Green and efficient choline hydroxide-promoted C(sp3)-H selenation of arylacetamides at room temperature
A novel, efficient and environmentally friendly synthetic method has been developed for C(sp)-H selenation of arylacetamides with readily available diselenides as selenating reagents at room temperature. This protocol is applicable to a list of wide-ranging arylacetamides and diselenides, and provides various α-selenylated aryl amide derivatives with high yield using choline hydroxide (ChOH) as a green
A facile one-pot synthesis of N-substituted tetrahydroquinolines
作者:Thelagathoti Hari Babu、Gnanamani Shanthi、Paramasivan T. Perumal
DOI:10.1016/j.tetlet.2009.03.181
日期:2009.6
An uncatalyzed one-pot synthesis of N-substituted tetrahydroquinolines was achieved in good yields by the reaction of quinoline and alkyl/acyl halides with Hantzsch dihydropyridine ester under mild reaction conditions. (C) 2009 Elsevier Ltd. All rights reserved.