Calixpyrrole derivatives: "multi hydrogen bond" catalysts for gamma-butenolide synthesis

Molecules. 2009 Jul 15;14(7):2594-601. doi: 10.3390/molecules14072594.

Abstract

Calix[4]pyrrole (1), calix[2]m-benzo[4]pyrrole (2), 10alpha,20beta- and 10alpha,20alpha- bis(4-nitrophenyl)-calix[4]pyrroles 3 and 4, respectively, were found to exhibit various organocatalytic activities in the diastereoselective vinylogous addition reaction of 2-trimethylsilyloxyfuran (TMSOF, 7) to aldehydes. The gamma-hydroxybutenolide products are obtained in fairly good yields and with moderate diastereoselectivity. The structures of the catalysts, as well as the reaction conditions, strongly influence the efficiency of the reaction.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 4-Butyrolactone / analogs & derivatives*
  • 4-Butyrolactone / chemical synthesis
  • Aldehydes / chemistry
  • Calixarenes / chemistry*
  • Catalysis
  • Furans / chemistry
  • Hydrogen Bonding
  • Porphyrins / chemistry*

Substances

  • 2-trimethylsilyloxyfuran
  • Aldehydes
  • Furans
  • Porphyrins
  • calix(4)pyrrole
  • Calixarenes
  • butenolide
  • 4-Butyrolactone