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Erratum to “Lewis acid-mediated [3+2] cycloaddition between hydrazones and olefins”: [Tetrahedron Lett. 44 (2003) 3351]

✍ Scribed by Shū Kobayashi; Ryoji Hirabayashi; Haruka Shimizu; Haruro Ishitani; Yasuhiro Yamashita

Publisher: Elsevier Science
Year: 2003
Tongue: French
Weight: 43 KB
Volume: 44
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(03)00879-7

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Lewis acid-mediated [3+2] cycloaddition

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✍ Shū Kobayashi; Ryoji Hirabayashi; Haruka Shimizu; Haruro Ishitani; Yasuhiro Yama 📂 Article 📅 2003 🏛 Elsevier Science 🌐 French ⚖ 249 KB

Cycloaddition between hydrazones and olefins was accelerated in the presence of a stoichiometric amount of BF 3 •OEt 2 or a catalytic amount of Zr(OTf) 4 , Hf(OTf) 4 , or Sc(OTf) 3 under mild conditions. The corresponding pyrazolidine derivatives were obtained in moderate to high yields using this n