Stereocontrolled derivatization of 3-methoxyestra-1,3,5(10), n-tetraenes via lewis acid promoted prins reactions, (n=7; 8(9))

@article{Knzer1991StereocontrolledDO,
  title={Stereocontrolled derivatization of 3-methoxyestra-1,3,5(10), n-tetraenes via lewis acid promoted prins reactions, (n=7; 8(9))},
  author={Hermann K{\"u}nzer and Gerhard Sauer and Rudolf Prof. Dr. Wiechert},
  journal={Tetrahedron Letters},
  year={1991},
  volume={32},
  pages={743-746}
}
Synthese von Östronderivaten aus Siloxycyclopropancarbonsäureestern
Synthese of Estrone Derivatives from Siloxycyclopropanecarboxylic Acid Esters Syntheses of new rac-estrone analogues such as 10, 19, 21 and 22 are reported. Key intermediate 3 has been
A Molecular Electron Density Theory Study of the Competitiveness of Polar Diels–Alder and Polar Alder-ene Reactions
TLDR
The term “pseudocyclic selectivity” is suggested to connote the selective formation of structural isomers through stereoisomeric pseudocyclIC TSs in highly polar processes.
Steroids: reactions and partial synthesis.
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Durch Grignard-1.6-Addition wird aus dem 17.20;20.21-Bis-methylendioxy-Δ1.4.6.9>(11)-pregnatetraen-on-(3) das 7ζ-Methyl-17.20; 2021 20.21-bis-methylendioxy-Δ1.5.9(11)-pregnatrien-on-(3) erhalten.
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TLDR
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