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Paper | Regular issue | Vol 60, No. 5, 2003, pp.1053-1063
Published online, 24th March, 2003
DOI: 10.3987/COM-02-9651
Synthesis and Crystal Structure of New Dinitro Derivatives of Sesquiterpene Lactone Achillin

Adekenov Sergazy Mynzhasarovich,* Rakhimova Bibigul Bagdatovna, Kulyjasov Arman Tabylovich, Seema Zareen, M. Iqbal Choudhary, and Atta-ur-Rahman

*International Centre for Chemical Sciences, H. E. J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan

Abstract

An unexpected dinitro derivative (2) of sesquiterpene lactone achillin (1), isolated from the aerial part of Achillea micrantha Wild., was formed when this compound was exposed to gaseous NOCl in CHCl3. This derivative was transformed into dinitrocarbonic acid (3) in pyridine in 30 minutes and in quantitative yield. The structures of these compounds were unambiguously determined by single-crystal X-Ray diffraction analysis.