Synthesis of β-octabromocalix[4]pyrroles and conformational diversity in their acetone inclusion complexes

Tetrahedron Letters

Volumn 49, Issue 6, 2008, Pages 960-964

  Dey, Soumen ^a   Pal, Kuntal ^a   Sarkar, Sabyasachi ^a  

^a INDIAN INSTITUTE OF TECHNOLOGY KANPUR   (India)

Author keywords

Adduct; Bromination; meso Tetraethyltetramethylcalix 4 pyrrole; X ray structure

Indexed keywords

3 OCTAMETHYLCALIX[4]PYRROLE; 3 TETRAETHYLTETRAMETHYLCALIX[4]PYRROLE; ACETONE; BETA OCTABROMOCALIX[4]PYRROLE DERIVATIVE; BROMINE; PYRROLE DERIVATIVE; UNCLASSIFIED DRUG;

ARTICLE; CARBON NUCLEAR MAGNETIC RESONANCE; COMPLEX FORMATION; CRYSTAL STRUCTURE; HYDROGEN BOND; PURIFICATION; SYNTHESIS;

EID: 37849019825     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2007.12.025     Document Type: Article

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32. -1): 3428 (s, N-H), 2926, 2855 (C-H), 1707 (s, C{double bond, long}O), 1546, 769.
33. -1) 3426 (s, N-H), 2922, 2855 (C-H, aliphatic stretching), 1708 (s, C{double bond, long}O), 1580, 766. FAB-MS: m/z at 1116 for free 2a. Also fragment peaks at 1087, 1038 due to removal of 1 Et or 1 Br, respectively.
34. -1.
35. 2CO have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication numbers CCDC 663230 and 663231. Copies of the data can be obtained free of charge, on application to CCDC, 12 Union Road, Cambridge, CB2 1EZ, UK [fax: +44 (0) 1223 336033 or e-mail: deposit@ccdc.cam.ac.uk].