benzoxazoles with aryl halides. A series of aryl, heteroaryl, and druglike electrophiles relevant to pharmaceutical applications were surveyed. The desired arylated products were obtained in synthetically useful yields using electronically and structurally varied aryl halides. The use of microscale high-throughput experimentation was essential for both the rapid identification of optimal reaction parameters
Palladium(II) Immobilized Onto the Glucose Functionalized Magnetic Nanoparticle as a New and Efficient Catalyst for the One-pot Synthesis of Benzoxazoles
Palladium(II) have been immobilized into the nano magnetic Fe3O4 which was functionalized with glucose in order to achieve a one‐pot synthesis of 2‐substituted benzoxazole derivatives with high yields in the diverse range of organic solvents. The nano catalyst is highly dispersive in polar solvents and can be easily recovered and reused for 6 runs without significant loss of its activity. Finally,
钯(II)已被固定在纳米磁性的Fe 3 O 4中,并用葡萄糖对其进行了功能化,以便在各种有机溶剂中以高收率一次合成2取代的苯并恶唑衍生物。纳米催化剂在极性溶剂中具有高度分散性,可以轻松回收并重复使用6次,而不会显着降低其活性。最后,通过FT-IR,TGA,CHN,SEM,EDX和原子吸收光谱对催化剂进行了全面表征。
A one-pot, two-step microwave-assisted synthesis of highly functionalized benzoxazoles using solid-supported reagents (SSRs)
作者:Marco Radi、Sara Saletti、Maurizio Botta
DOI:10.1016/j.tetlet.2008.05.059
日期:2008.7
A one-pot, two-step protocol for the microwave-assisted solid-phase synthesis of substituted benzoxazoles has been developed starting from different polymer-bound esters we previously designed as solid-supportedreagents (SSRs) for the acylation of amines, alcohols and phenols. The combination of a parallel synthesizer and a microwave reactor allowed to quickly prepare a collection of substituted benzoxaxoles
Compounds, Compositions and Methods for Stabilizing Transthyretin and Inhibiting Transthyretin Misfolding
申请人:Labaudinière Richard
公开号:US20110092545A1
公开(公告)日:2011-04-21
Compounds, compositions and methods are provided for stabilizing transthyretin and for treating, preventing, or ameliorating one or more symptoms of transthyretin mediated diseases. In one embodiment, the compounds are benzoxazoles and related compounds.
The direct C-H bond arylation of (benzo)oxazoles with aryl chlorides was achieved catalyzed by a well-defined NHC-Pd(II)-Im complex. Under the optimal conditions, various aryl chlorides were successfully applied as the arylating reagents to achieve the 2-aryl (benzo)oxazoles in acceptable to high yields, providing a convenient and alternative method for the direct C-H bond arylation of (benzo)oxazoles and enriching the chemistry of the NHC-Pd(II) complex in organic synthesis.