A short approach to chaetomellic anhydride A from 2,2-dichloropalmitic acid: elucidation of the mechanism governing the functional rearrangement of the chlorinated pyrrolidin-2-one intermediate

F Bellesia, C Danieli, L De Buyck, R Galeazzi, F Ghelfi, A Mucci, M Orena, U M Pagnoni, A F Parsons, F Roncaglia

Research output: Contribution to journalArticlepeer-review

Abstract

Chaetomellic anhydride A was efficiently attained in three steps, starting from 2,2-dichloropalmitic acid and 2-(3-chloro-2-propenylamino)pyridine. Atom transfer radical cyclisation selectively formed the cis-stereoisomer of the trichloropyrrolidin-2-one, which underwent a stereospecific functional rearrangement to form a substituted maleimide. The choice of 2-pyridyl, as 'cyclisation auxiliary' in the atom transfer radical cyclisation step, proved beneficial for hydrolysis of the maleimide to form the desired anhydride. (c) 2005 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)746-757
Number of pages12
JournalTetrahedron
Volume62
Issue number4
DOIs
Publication statusPublished - 23 Jan 2006

Keywords

  • halocompound
  • pyrrolidinone
  • radical reaction
  • rearrangement
  • FARNESYL-PROTEIN TRANSFERASE
  • TRANSFER RADICAL CYCLIZATION
  • STEREOSELECTIVE-SYNTHESIS
  • DIMETHYLMALEIC ANHYDRIDE
  • MOLECULAR MECHANICS
  • EFFICIENT SYNTHESIS
  • FACILE SYNTHESIS
  • GAMMA-LACTAMS
  • CUCL-TMEDA
  • ANALOGS

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