Transition metal-catalyzed carbocyclization of nitrogen and oxygen-tethered 1,n-enynes and diynes: synthesis of five or six-membered heterocyclic compounds
作者:Di-Han Zhang、Zhen Zhang、Min Shi
DOI:10.1039/c2cc34739c
日期:——
gylic esters to 5,6-dihydropyridazin-4-one derivatives. Furthermore, we will introduce three interesting examples of the synthesis of bicyclic compounds via titanium or rhodium catalyzed carbocyclization of enynes. In this context, we have presented that 1,n-enynes and diynes containing propargylic esters are highly reactive and usefulstartingmaterials for the cycloisomerization catalyzed by a transition
Silver(I)-Catalyzed Tandem 1,3-Acyloxy Migration/Mannich-type Addition/Elimination of the Sulfonyl Group of N-Sulfonylhydrazone-propargylic Esters to 5,6-Dihydropyridazin-4-one Derivatives
作者:Zhen Zhang、Min Shi
DOI:10.1002/chem.201103404
日期:2012.3.19
The addition of nucleophiles to CN bonds offers a highly efficient synthetic strategy for accessing nitrogen‐containing molecules.1 Among the well‐developed addition reactions, such as the highly efficient Mannich reaction, various CH bond‐activated compounds including carboxylic acid derivatives, nitroalkanes, and terminal alkynes have been applied as nucleophiles to achieve different classes of