%0 Journal Article
%T Photomediated Transformation of Salannin, a Tetranortriterpenoid from Azadirachta indica A. Juss
%A Geetha Gopalakrishnan
%A N. D. Pradeep Singh
%A V. Kasinath
%J Molecules
%D 2001
%I MDPI AG
%R 10.3390/60600551
%X Photolysis of Salannin (1), an important bioactive compound from Azadirachta indica A.Juss (Neem), affords жд17-isosalanninolide (2), a hitherto unknown compound, along with isosalanninolide (3) and salanninolide (4). A probable mechanism has been suggested. While the mechanism of formation of 2 involves both a [4+2] cycloaddition and a [1,3] sigmatropic shift in the furan and D-rings, respectively, formation of 3 and 4 involves the decomposition of an ozonoide-like peroxide intermediate.
%K Azadirachta indica
%K Salannin
%K cycloaddition
%K sigmatropic shift
%K antifeedant
%U http://www.mdpi.com/1420-3049/6/6/551