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Bagal, S.K., Adlington, R.M., Brown, R.A.B. and Baldwin, J.E. (2005) Regioselectivity of Dimerisation of Butenolides via Captodative Stabilised Radicaloid Intermediates. Tetrahedron Letters, 46, 4633-4637.
http://dx.doi.org/10.1016/j.tetlet.2005.04.125

has been cited by the following article:

• TITLE: Natural and Semi-Synthetic Pseudoguaianolides as Inhibitors of NF-κB

  AUTHORS: Rodrigo Villagomez, Juan Antonio Collado, Eduardo Muñoz, Giovanna Almanza, Olov Sterner

  KEYWORDS: Damsin, α Methylene-γ-Lactone Sesquiterpenoids, Anti-Cancer Activity

  JOURNAL NAME: Journal of Biomedical Science and Engineering, Vol.7 No.10, August 14, 2014

  ABSTRACT: Damsin (1) is a natural pseudoguaianolide sesquiterpene that inhibits NF-κB, a protein complex that controls the transcription of DNA in mammalian cells, and has a potential for standing model for the development of new anti-cancer lead structures. In order to do a preliminary structure-activity study and improve the anti-cancer activity, fourteen derivatives and analogs were prepared and evaluated. These were chosen to represent both structural diversity and structural novelty. The importance of α methylene-γ-lactone moiety for the anti-cancer activity was confirmed, even though other features in the scaffold were shown to be important for the activity. In some cases a new substitution negatively affected the initial activity, however, two analogues, indolo [3,2-c]-4-desoxydamsin (5) and ambrosin (6), were found to be more potent.