Rutile phase nanoTiO2 as an effective heterogeneous catalyst for condensation reaction of isatin derivatives with 1,2-diaminobenzene under solvent free conditions: A greener “NOSE” approach

Rutile phase of TiO₂ nanoparticles were readily prepared and identified as an efficient heterogeneous catalyst for the synthesis of a library of quinoxaline derivatives by condensation reaction of isatin derivatives with o-phenylenediamine under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields. The recyclability of the catalyst is another emphasis of proposed methodology.     

A Novel Approach for the Synthesis of Furopyrimidine and Oxobenzofuran Derivatives

A novel, efficient one‐pot approach for the synthesis of furopyrimidine and oxobenzofuran derivatives 4 by a multicomponent reaction of an isocyanide, an aldehyde, and a CH‐acid compound in CH₂Cl₂ is reported (Scheme 1 and Table). The reactions were completed after 20 h at room temperature. This method has the advantages of high yields, simple methodology, and easy workup.     

有机噻吩类衍生物作为电致变色材料*

噻吩类衍生物包括聚噻吩衍生物和齐聚噻吩衍生物。本文从有目的地设计、合成噻吩类衍生物的角度出发,探索了其作为电致变色材料的应用,综述了噻吩类衍生物作为电致变色材料的最新研究进展。