No abstract

No abstract

A green atom‐economical method for the synthesis of biaryl sulfonamide derivatives via palladium(II)‐catalyzed CH bond activation by employing an amino acid moiety as the bidentate directing group has been developed. The protocol proceeded efficiently in water; high yields and broad substrate scope were achieved. The reaction shows good functional group compatibility and proceeds in a highly selective manner at the ortho position of arenes connected to sulfonamide sulfur atoms. This auxiliary can be easily removed either by acidic hydrolysis, or converted into primary biaryl sulfomamides with a 30 mol % amount of CuO as catalyst. Mechanistic studies show that the present bidentate directing group is essential for promoting ortho CH bond activation of arenes connected to sulfonamide sulfur atoms.

No abstract

The aim of this chapter is to present some recent findings on the fabrication of anodic aluminum oxide (AAO) layers by anodization of low purity aluminum substrates. The use of low purity, technical aluminum alloys, instead of high purity substrates, can significantly reduce the cost of AAO fabrication, however, this can also affect the structure and properties of as produced alumina layers. Here, we focused on the comparison of oxide layer growth on substrates with different Al contents, as well as on the new procedures used for the synthesis of well-ordered nanoporous oxides from technical aluminum alloys. Some applications of the formed nanoporous AAO layers are presented. IntroductionDuring the recent years nanomaterials have received significant attention due to many unique chemical and physical properties that make them promising materials for various modern applications. As a result, nanotechnology is now one of the most popular sciences which have opened a lot of new perspectives in almost all scientific disciplines [1]. Up to now, the main problem that limits the practical application of nanomaterials is a relatively high cost of nanofabrication [2]. That is why considerable research efforts focus on the design and control of novel nanostructures via innovative synthetic strategies. A big attention has been paid to development a simple and inexpensive method of nanofabrication that can be used not only in a laboratory scale but also could have some potential for a commercial-scale implementation. Among numerous strategies reported in the literature, one of the most popular method for fabricating nanostructured oxide layers on the metal surface is controlled anodic oxidation (anodization) of metals under