... Clean five-step synthesis of an array of 1,2,3,4-tetra-substituted pyrroles using polymer-supported reagents Marina Caldarelli, Jörg Habermann and Steven V. Ley * Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK CB2 1EW ... Soc., Perkin Trans. 1, 1998, 2239; (d) MH Bolli and SV Ley, J. Chem. Soc., Perkin Trans. 1, 1998, 2243; (e) J. Habermann, SV Ley and JS Scott, J. Chem. Soc., Perkin Trans. 1, 1998, 3127. ...