10003-03-9Relevant articles and documents
A Synthesis of (+/-)-Estrone Methyl Ether via the Tandem Cope-Claisen Rearrangement
Ziegler, Frederick E.,Lim, Hong
, p. 5229 - 5230 (1982)
A synthesis of (+/-)-estrone methyl ether (7b) is described that employs a new approach to the construction of the estrogen skeleton invoking the tandem Cope-Claisen rearrangement.
Miller
, p. 3829,3832 (1969)
Meyers,Kolb
, p. 1985,1989 (1978)
Vasiyarov,Ananchenko
, (1974)
Lenz
, p. 468 (1972)
Formal total synthesis of (±)-estrone and zirconocene-promoted cyclization of 2-fluoro-1,7-octadienes and ru-catalyzed ring closing metathesis
Herrmann, Pavel,Budesinsky, Milos,Kotora, Martin
, p. 6202 - 6206 (2008/12/22)
(Chemical Equation Presented) A new and diastereoselective method for the synthesis of the estrone skeleton from a substituted styrene based on sequential 3-fold use of Cp2ZrBu2 (oxidative addition-alkylation and two cyclization-alkylation sequences) and a ruthenium complex catalyzed RC-metathesis of a sterically hindered diene was developed. The prepared estratetraene was obtained in 7 steps from a commercially available starting material and thus the overall synthesis of estrone could be accomplished in 9 steps. Moreover, we have also found that the course of the reaction of substrates bearing the 2-halo-1,7-diene moiety with Cp2ZrBu 2, i.e., cyclization or oxidative addition to the C-X bond, could be controlled by the nature of the halogen leaving group.
Total synthesis with a chirogenic opening move demonstrated on steroids with estrane or 18a-homoestrane skeleton
Quinkert,Del Grosso,Doring,Doring,Schenkel,Bauch,Dambacher,Bats,Zimmermann,Durner
, p. 1345 - 1391 (2007/10/02)
A concept of first choice for the synthesis of the title compounds had been proposed by Dane in the late 1930s. It was soon turned down, because the opening move - a chirogenic Diels-Alder reaction - did not work. With Lewis acids as mediators, however, a successful start has been achieved now. With Ti complexes of chelating ligands (Seebach's TADDOLs (= α,α,α',α'-tetraaryl-1,3-dioxolane-4,5-dimethanols)), enantioselective formation of the desired adducts does occur. Efficient total syntheses of 2 and 3a have been accomplished.