c- and t-3-Acetyl-1,c-2-dimethyl-r-1-cyclopentanols and c-3-acetyl-1,t-2-dimethyl-r-1-cyclopentanol are synthesized stereoselectively and dl-plinols A, B, and C are prepared therefrom.
The Magnesium−Ene Cyclization Stereochemically Directed by an Allylic Oxyanionic Group and Its Application to a Highly Stereoselective Synthesis of (±)-Matatabiether. Allylmagnesium Compounds by Reductive Magnesiation of Allyl Phenyl Sulfides<sup>1</sup>
more easily prepared in a connective fashion than the usual allyl halide precursor. Since the presence of lithium ions encourages undesirable proton transfer to the cyclized organometallic and is detrimental to the stereochemical control, the conversion of the allylic thioether to the allylmagnesium utilizes a lithium-free method involving direct reductive magnesiation in the presence of the magnesium-anthracene
Zur kenntnis der ätherischen öle 6. Mitteilung [1] die thermische cyclisation des (−)-(r)-Linalools. Die struktur der Plinole und einiger derivate mit Iridan-Gerüst [2]
作者:H. Stirickler、G. Ohloff、E. Sz. Kováts
DOI:10.1002/hlca.19670500305
日期:1967.4.20
On heating linalool, all the four possible diastereomeric plinols are formed by way of an intramolecular Alder “ene”-synthesis. The knowledge of their absolute configuration, shown to be 2A-2D, allows a discussion of the stereochemical course of this reaction.