Enantioselective synthesis of an intermediate for the intramolecular Diels-Alder construction of 11-ketosteroids
作者:Gilbert Stork、Nicholas A Saccomano
DOI:10.1016/s0040-4039(00)96050-7
日期:1987.1
The optically active indanepropionic acid, , is prepared via a short and stereoselective sequence. This material is used in an enantioselective route to adrenosterone, .
光学活性的茚满丙酸,是通过短的和立体选择性的序列制备的。该物质用于对肾上腺素的对映选择性途径。
A new strategy for the preparation of 11-oxygenated steroids synthesis of (±)-adrenosterone
作者:Paul A. Grieco、Scott A. May、Michael D. Kaufman
DOI:10.1016/s0040-4039(98)01526-3
日期:1998.9
Conjugate 1,4-addition of 1-[(tert-butyldimethylsilyl)oxy]-2-methyl-1,3-cyclohexadiene (5) to 2-methyl-cyclopentenone in highly polar media and subsequent alkylation of the resultant silyl enol ether (4) with phenylthiodienyl carbonate 10 in 5.0 M LiClO4·Et2O provides substrate 2. Exposure of 2 to TMSOTf/TMSOCH2CH2OTMS affords tetracyclic bis-ketal 3, which is converted into (±)-adrenosterone (1) in