@article{oai:kutarr.kochi-tech.ac.jp:00000236, author = {Nishiwaki, Nagatoshi and Kobiro, Kazuya and Hirao, Shotaro and Sawayama, Jun and Saigo, Kazuhiko and Ise, Yumiko and Nishizawa, Maho and Ariga, Masahiro}, issue = {10}, journal = {Organic & Biomolecular Chemistry}, month = {}, note = {A new protocol for synthesizing different functionalized isoxazoles is provided. Carbamoylnitrile oxide generated from nitroisoxazolone underwent inverse electron-demand 1,3-dipolar cycloaddition with 1,3-dicarbonyl compounds in the presence of magnesium acetate that formed magnesium enolatein situ. Although electron-deficient trifluoroacetoacetate did not undergo this cycloaddition under the same conditions, conversion to sodium enolate furnish the corresponding bis-functionalized trifluoromethylisoxazole. The DFT calculations using B3LYP 6-31G+(d,p) also supported the aforementioned reactivity.}, pages = {1987--1991}, title = {One-step synthesis of differently bis-functionalized isoxazoles by cycloaddition of carbamoylnitrile oxide with β-keto esters}, volume = {10}, year = {2012} }