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Herein, a straightforward method for the construction of tetrazole derivatives has been achieved through Pd‐catalyzed isocyanide insertion reactions, which is a good extension for the response of multi‐molecule isocyanides. The Ugi‐N3 reaction was introduced to the transformation to enrich the diversity of skeleton structures. The commercially available starting materials and moderate to good yields make this method a valuable tool for generating N‐containing heterocyclic compounds. [ABSTRACT FROM AUTHOR]

The catalytic cyclopropanation of spiro[2.4]hepta‐4,6‐diene and 1,1,2,2‐tetradeutero‐, 1‐methyl‐, and 1,1‐dimethylspiro[2.4]hepta‐4,6‐dienes on treatment with excess diazomethane in the presence of palladium catalysts, which gives products of double bond dicyclopropanation, is also accompanied by an unusual transformation of the three‐membered ring of the spiro moiety with elimination of the unsubstituted methylene group in the form of ethylene to give the corresponding 5‐methylidenetricyclo[4.1.0.02,4]heptanes (bishomofulvenes). The putative mechanism of the reactions is considered. [ABSTRACT FROM AUTHOR]

A recyclable and non‐phosphine solid palladium (II) catalyst was prepared and characterized by HR‐MS, FT‐IR, XPS, EDS, TGA, SEM, TEM and ICP. The Pd‐catalyst exhibited high‐performance catalytic activity in Suzuki and Heck C‐C coupling reactions in an environmentally benign water medium. Further, the Pd‐catalyst (Z4) can be reused for 15 times with little decrease of activity through simple and efficient recovery. In addition, the turn‐over number (TON) of Pd‐ catalyst can reach 380 at room temperature. These results proved that the Pd‐catalyst has a stable structure and can be recycled many times, making the process sustainable. [ABSTRACT FROM AUTHOR]