REVIEW OF LITERATURE

11
reaction of equilibrated β,p-dimethylcinnamonitrile with
isobutylmagnesium bromide gives ar-isoturmerone (IV) which was
assigned a trans-structure on the basis of its NMR data. The synthesis of
ar-A+1 antone (V), also being reported for the first time, is achieved
through bromination followed by dehydrobromination of ar-
dihydroturmerone (III), ar-Isoturmerone (IV) and ring sesquiterpenoid
ketones, - trans-atlantone and ar-turmerone. The conversion of ar-
dihydroturmerone (III) to a sesquiterpenoid indane was also reported.
Jamieson et al. (1972) described that conifer leaf lipids contained
in addition to the fatty acid found in angiosperms, a series of
polysaturated acid with Δ 5 olefinic unsaturated. All the species contain
C20 acids and the member of the family, Pinaceae, contain in addition a
series of C18 acids. In many species significant amounts of a saturated
C17 branched chain acid were present among certain lipid classes the
distribution of polysaturated acid was investigated and it was found that
C16 and C18 polysaturated acid with unsaturated are concerned in the
galactosyl diglycerides.
Debelmas et al. (1973) worked on medicinal plants in Nepal folk.
Phytochemical screening 40 sample of common plants available in local
markets was accomplished. Different new substances were detected, e.g.
in Incyperus scariosus alkaloids are present. In Adhatoda vasica, Lobelia
pyramidis, Swertia chirate steroids are present. Myrica esculenta, Vepris
bilocularis, Polipodium contain quinone. C. scariosus contains flavonoids