Crystal structures of N-tert-butyl-3-(4-fluoro-phenyl)-5-oxo-4-[2-(trifluoromethoxy)phenyl]-2,5-dihydrofuran-2-carboxamide and 4-(2H-1,3-benzo-dioxol-5-yl)-N-cyclohexyl-5-oxo-3-[4-(trifluoro-methyl)phenyl]-2,5-dihydrofuran-2-carboxamide

Sue A. Roberts, Guillermo Martinez-Ariza, Christopher Hulme, A. J. Lough

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The title compounds, C22H19F4NO4, (I), and C25H22F3NO5, (II), each contain a central nearly planar dihydrofuranone ring. The r.m.s. deviation from planarity of these rings is 0.015 Å in (I) and 0.027 Å in (II). The molecules are T-shaped, with the major conformational difference being the O - C - C - O torsion angle [-178.9 (1) in (I) and 37.7 (2)° in (II)]. In the crystal of (I), molecules are linked by N - H⋯O hydrogen bonds, forming chains along [001] while in (II) molecules are linked by N - H⋯O hydrogen bonds, forming chains along [010]. In (II), the trifluoromethyl substituent is disordered over two sets of sites, with refined occupancies of 0.751 (3) and 0.249 (3).

Original languageEnglish (US)
Pages (from-to)199-202
Number of pages4
JournalActa Crystallographica Section E: Structure Reports Online
Issue number2
StatePublished - Feb 1 2015


  • Butenolides
  • Crystal structure
  • N - H⋯O hydrogen bonding
  • Pharmaceuticals

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


Dive into the research topics of 'Crystal structures of N-tert-butyl-3-(4-fluoro-phenyl)-5-oxo-4-[2-(trifluoromethoxy)phenyl]-2,5-dihydrofuran-2-carboxamide and 4-(2H-1,3-benzo-dioxol-5-yl)-N-cyclohexyl-5-oxo-3-[4-(trifluoro-methyl)phenyl]-2,5-dihydrofuran-2-carboxamide'. Together they form a unique fingerprint.

Cite this