2465-00-1Relevant articles and documents
A Simple Method for the Reduction of the 7,8-Double Bond of Steroidal 5,7-Dienes
Anastasia, Mario,Ciuffreda, Pierangela,Fiecchi, Alberto
, p. 1169 - 1170 (1982)
1,4-Cycloadducts of various steroidal 5,7-dienes and 4-phenyl-1,2,4-triazoline-3,5-dione gave a separable mixture (3 : 2) of the corresponding Δ5- and Δ7-sterols in good yield when treated with lithium dissolved in refluxing ethylamine.
Preparation of steroid olefins from heptafluorobutyrates
Dalibov, Lucie,Kohout, Ladislav
, p. 549 - 556 (2007/10/03)
Steroids with hydroxyl group in positions 2, 3, 6, 7, 17 and 20 were esterified with heptafluorobutyric anhydride. The obtained esters on treatment with lithium bromide in N,N-dimethylacetamide in the presence of pyridinium tosylate afforded the corresponding olefins in high yields.
Studies on the Constituents of Pollen. X. On the Constituents of Pollen Grains of Ambrosia elatior LINNE
Ohmoto, Taichi,Ikeda, Keiji,Chiba, Takeo
, p. 2780 - 2786 (2007/10/02)
The new sterols 4α,14-dimethyl-9,19-cyclocholestan-3β,24ξ-diol (IIIa) and 4α,14-dimethyl-9,19-cyclocholestan-3β,24ξ,25-triol (IVa) were isolated, together with lophenone, lophenol, and cholest-7-en-3β-ol, from the pollen grains of Ambrosia elatior LINNE.The structures were elucidated on the basis of spectroscopic studies and chemical evidence.Keywords-Ambrosia elatior LINNE; Compositae; pollen grains; lophenone; lophenol; cholest-7-en-3β-ol; 4α,14-dimethyl-9,19-cyclocholestan-3β,24ξ-diol; 4α,14-dimethyl-9,19-cyclocholestan-3β,24ξ,25-triol