Stereoselective Synthesis

Steroids and Stereochemistry.- Enantioselective Catalysis with Chiral Metal Complexes.- 1. Introduction.- 2. Chiral C2-Symmetric Semicorrins.- 3. Analogues of Semicorrins: Aza-semicorrins and Bis (oxazolines).- 4. Pd-Catalyzed Allylic Substitution.- References.- New Aspects in Stereoselective Synthesis of Aminoalcohols and Amino Acids.- 1. The 1–3 segment.- 2. The 6-Position.- 3. Position 9: Prolines.- 4. Position 6, 8 or others: BAZ.- 5. Conclusion.- References.- Enzymemimetic C-C and C-N Bond Formations.- 1. Introduction.- 2. Enzymemimetic C-C Bond Formations.- 2.1. Diastereo-and Enantioselective C-C Bond Formations with a Chiral Dihydroxyacetone Phosphate Equivalent.- 2.2. Diastereo- and Enantioselective C-C Bond Formations with a Chiral Phosphoenolpyruvate Equivalent.- 2.3. Asymmetric Nucleophilic Acylations with Synthetic Equivalents for the “Active Aldehydes”.- 3. Enzymemimetic C-N Bond Formations.- 4. Conclusion.- References.- Synthesis of Natural Products of Polyketide Origin, an Exemplary Case.- 1. Aims of Natural Product Synthesis, Changes over Time.- 2. New Methods for the Synthesis of Polyketide Derived Natural Products.- 3. Linear Synthesis of a Protected seco-Aacid of 9(S)-Dihydroerythronolide A.- 4. The Macrolactonization to 9(S)-Dihydroerythronolide A.- References.- Progress in the Diels/Alder Reaction Means Progress in Steroid Synthesis.- 1. Evaluation of the Diels/Alder Reaction: Cantharidin.- 2. Evaluation of the Diels/Alder Reaction: Norgestrel.- 2.1 Norgestrel Synthesis with Intramolecular Diels/Alder Reaction.- 2.2 Norgestrel Synthesis with Intermolecular Diels/Alder-Reaction.- 3. Parerga.- References.