Polyene compounds useful in the treatment of allergic responses
申请人:USV Pharmaceutical Corp.
公开号:US04595696A1
公开(公告)日:1986-06-17
Polyene compounds represented by the general formula ##STR1## where R.dbd.H or lower alkyl group of from 1 to 5 carbon atoms ##STR2## n is 0-1 x is O or S; and R.sub.1 =an alkyl group of from 1 to 5 carbon atoms; and the pharmaceutically acceptable salts thereof. and the pharmaceutically acceptable salts thereof. The foregoing compounds have been found to be effective in regulating the formation of lipoxygenese and as such possess therapeutic value in the treatment of inflammatory conditions and allergic responses.
and is tolerant of a broad range of functional groups. A wide scope of alkenyl carboxylic acids, including challenging conjugated polyene carboxylic acids, are amenable to this transformation and no addition of external oxidant is required. Mechanistic studies revealed that (1) Boc2O acts as the activator for the in situ transformation of the carboxylic acids into anhydrides before oxidative addition
Energy and electron transfer reactions of polyenic acids with variable chain lengths
作者:Asma Zaidi、He Li、Hans-Richard Sliwka、Vassilia Partali、Hansgeorg Ernst、Thor B. Melø
DOI:10.1016/j.tet.2012.10.041
日期:2013.1
Highly unsaturated conjugated fatty acids (carotenoic acids) with 5–15 conjugated double bonds were irradiated by flash pulses in the presence of the sensitizer riboflavin. The resulting triplet and radical cation transients were analyzed and the underlying energy and electrontransferreactions determined experimentally and by calculation. The two key antioxidant reactions of carotenoids summarize in ar