Copper-catalyzed synthesis of 2-arylbenzoxazoles from o -aminophenol derivatives with arylmethyl chlorides
作者:Guodong Zhang、Peng Wang、Fan Yang、Yangjie Wu
DOI:10.1016/j.tet.2014.11.040
日期:2015.1
A facile and efficient synthesis of 2-arylbenzoxazoles via copper-catalyzed tandem condensation/oxidative reaction of o-aminophenolderivatives with arylmethyl chlorides was developed. Note that this reaction utilized arylmethyl chlorides as a new type of simple and cheap acyl sources and KNO3 as a readily available and low-cost benign oxidant.
Synthesis of 2-Arylbenzoxazoles through Oxidation of C-H Bonds Adjacent to Oxygen Atoms
作者:Lijun Gu、Wei Wang、Yong Xiong、Xiangzhong Huang、Ganpeng Li
DOI:10.1002/ejoc.201301504
日期:2014.1
A practical and simple synthesis of benzoxazoles from easily available substrates was developed. The protocol is triggered by an iron-catalyzed tandem oxidative process from simple ether derivatives.
Parallel synthesis of benzoxazoles via microwave-assisted dielectric heating
作者:Richard S. Pottorf、Naresh K. Chadha、Martins Katkevics、Vita Ozola、Edgars Suna、Hadi Ghane、Tor Regberg、Mark R. Player
DOI:10.1016/s0040-4039(02)02495-4
日期:2003.1
A facile route to benzoxazoles has been developed using microwave-assisted dielectric heating. The ease of synthesis and workup allowed the parallelsynthesis of a 48-membered library of benzoxazoles quickly and efficiently.
Ruthenium-Catalyzed Synthesis of Benzoxazoles Using Acceptorless Dehydrogenative Coupling Reaction of Primary Alcohols with 2-Aminophenol under Heterogeneous Conditions
作者:Ali Khalafi-Nezhad、Farhad Panahi
DOI:10.1021/cs5000872
日期:2014.6.6
An efficient ruthenium-catalyzed acceptorless dehydrogenative coupling reaction of primary alcohols with 2-aminophenol for one-pot synthesis of benzoxazoles is introduced. The phosphine-functionalized magnetic nano-particles (PFMNPs; Fe3O4@SiO2@PPh2) as a magnetic recyclable phosphorus ligand in the presence of Ru2Cl4(CO)(6) was found to be an efficient heterogeneous catalytic system for promotion of the designed protocol. The reaction was carried out efficiently with a variety of substrates to give the corresponding products in moderate to good yields.
Photochemical and thermal reactions of aromatic Schiff bases