Winterstein

KUHN - WINTERSTEIN Olefinatlon OMin formation from glycols by means of P2 te... 

Of these authenticated species, Chondrodendron candicans and C. tomento-sum have been examined by King (pp. 364, 376) and the results of work by Wintersteiner and Duteher and by King on curares described as made from C. tomentosum are given below. 

Taxine, C3,HgiOioN, is contained in the leaves, shoots and fruits of the yew (Taxus baccata), from which it was first isolated by Lucas. It was investigated by Marm, Hilger and Brande, Amato and Capparelli, Thorpe and Stubbs, Winterstein et al., Kondo et al., Takahashi and Gulland et al. ... 

The C-nor-D-homosteroid rearrangement was discovered by Hirschmann and co-workers at the time that Wintersteiner and his collaborators established that the steroid alkaloids jervine and veratramine incorporate a 14 (1312) abeo-nng system. This was the predecessor of the family of simultaneous ring contraction-expansion reactions. Solvolysis of the 12j5-methanesulfonate (144a) gives mainly the kinetic reaction product, the C-nor-D-homo exocyclic olefin (145) along with some 13(17)-ene (146a). 

R.Kuhn,A.Winterstein and E.Lederer, Hoppe-Seyler s Z. Physiol. Chem., 197(1931)141. 

Kuhn, R. and A. Winterstein (1930). About the occurrence of lutein in the plant kingdom (German). 

It is reoommended that, as a further example of the method, industrial anthra-oene should be purified as desoribed by Winterstein, Schon, and Vetter (Z. physiol. Chem., 1934, 230, 158). Magnifioent leaflets having a blue fluorescence can be obtained when the hydrocarbon is purified in this way. 

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