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This paper presents an effective method to fabricate highly porous zinc oxide (ZnO) derived from different wood templates, where the microstructure features of wood template were well reproduced in the final product. Biomorphic ZnO was fabricated via the sol–gel method by the infiltration of the precursor sol into the wood template and the sintering of wood template at high temperature under air atmosphere. Many characterization methods such as x-ray diffraction (XRD), scanning electron microscopy (SEM) and pore size analyzer detection were used to investigate the crystalline phase and microstructure of the product as well as the pore size of biomorphic ZnO. In our work, highly porous ZnO derived from different wood templates had been prepared. The relevant results revealed that the specie of wood template and sintering temperature played vital roles in the pore size, specific surface area and pore volume of the product. [ABSTRACT FROM AUTHOR]

A convenient and efficient method for the synthesis of furoxan derivatives from α-nitro-ketoximes and sulfonyl chlorides is reported. A wide variety of furoxan derivatives were smoothly obtained in good yields via a DABCO-mediated cascade sulfonylation/cyclization process under mild conditions. The usefulness of this method was also demonstrated by the conversions of the furoxan products into other promising compounds. [ABSTRACT FROM AUTHOR]

Silver forges the ring: A new and practical silver‐catalyzed [5+2] cycloaddition method has been developed for the synthesis of azepines through the formation of four new chemical bonds between a γ‐amino ketone and an alkyne in one step. This method provides a new hetero‐[5+2] cycloaddition strategy for the construction of seven‐membered ring systems. [ABSTRACT FROM AUTHOR]

The products are obtained in very high yields and with high (alkyl) or excellent (aryl and hetaryl substituted derivatives) enantiomeric excesses. [ABSTRACT FROM AUTHOR]

A novel method for the synthesis of 2,3-dihydro-1H-azepines is established using a silver-catalyzed [5 + 2] cycloaddition of γ-aminoketones with terminal alkynes. [ABSTRACT FROM AUTHOR]

A three-component, two-step procedure offers a direct synthesis of the target compounds via iodocyclization of β-enaminone intermediates. [ABSTRACT FROM AUTHOR]