Synthesis of veprisine dimers and the formation of a novel cyclic tetramer from precocene I

Ngadjui, B. T., Ayafor, J. F., Bilon, A. E. N., Sondengam, B. L., Connolly, J. D. and Rycroft, D. S. (1992) Synthesis of veprisine dimers and the formation of a novel cyclic tetramer from precocene I. Tetrahedron, 48(40), pp. 8711-8724. (doi:10.1016/S0040-4020(01)89446-1)

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Abstract

Thermolysis of veprisine afforded vepridimerines A–D and in addition, a new dimer, vepridimerine E. The full details of the 1H and 13C NMR spectroscopic properties of vepridimerines A–E are presented. Acid treatment of veprisine gave another new dimer, diveprisine, analogous to the known precocene II dimer. Under the same conditions precocene I was transformed into a cyclic tetramer. High field NMR examination of the coumarin dimer, reported by Barnes et al. in 1963, confirmed the assigned structure.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Connolly, Professor Joseph and Rycroft, Dr David
Authors: Ngadjui, B. T., Ayafor, J. F., Bilon, A. E. N., Sondengam, B. L., Connolly, J. D., and Rycroft, D. S.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Tetrahedron
Publisher:Elsevier
ISSN:0040-4020
ISSN (Online):1464-5416
Published Online:01 March 2001

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