Polyoxygenated cyclohexene derivatives from Monanthotaxis congoensis

Composition of organic aerosol from cyclohexene ozonolysis

Investigating the composition of organic aerosol resulting from cyclohexene ozonolysis: low molecular weight and heterogeneous reaction products J. F. Hamilton, A. C. Lewis, J. Reynolds, L. J. Carpenter, and A. Lubben Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK Bruker Daltonics, Banner Lane, Coventry, CV4 9GH, UK Received: 26 April 2006 – Accepted: 16 May 2006 – ...

Verticillosides A–M: Polyoxygenated pregnane glycosides from Asclepias verticillata L

As part of our ongoing effort to explore the chemical diversity of plants of the United States Midwest region, the isolation and identification of 13 pregnane glycosides named verticillosides A–M from Asclepias verticillata L. are reported. The structures of these compounds were elucidated by various spectroscopic techniques, including 1D and 2D NMR, IR, UV, and HRMS. The cytotoxicity of the is...

Anti-Inflammatory Polyoxygenated Steroids from the Soft Coral Lobophytum michaelae

Three new polyoxygenated steroids, michosterols A-C (1-3), and four known compounds (4-7) were isolated from the ethyl acetate (EtOAc) extract of the soft coral Lobophytum michaelae, collected off the coast of Taitung. The structures of the new compounds were elucidated on the basis of spectroscopic analyses and comparison of the nuclear magnetic resonance (NMR) data with related steroids. The ...

Total synthesis of polyoxygenated cembrenes.

Using singlet oxygen to synthesize polyoxygenated natural products from furans.

[Reaction: see text]. Singlet oxygen is a powerful tool in the armament of the synthetic organic chemist and possibly in that of nature itself. In this Account, we illustrate a small selection of the many ways singlet oxygen can be harnessed in the laboratory to aid in the construction of the complex molecular motifs found in natural products. A more philosophical question is also addressed: na...