Diastereoselective Synthesis ofsyn-Alkanetriols from a Glyceral Derivative viak-Selectride Reduction: Application to the Synthesis of a Pheromone of the Sugarcane Weevils
ITO, MASAYUKI;KIBAYASHI, CHIHIRO, TETRAHEDRON LETT., 31,(1990) N5, C. 5065-5068
作者:ITO, MASAYUKI、KIBAYASHI, CHIHIRO
DOI:——
日期:——
Diastereoselective Synthesis of<i>syn</i>-Alkanetriols from a Glyceral Derivative via<scp>k</scp>-Selectride Reduction: Application to the Synthesis of a Pheromone of the Sugarcane Weevils
k-selectride reduction of commercially available d-mannitol derived ketones 2b-i produced the corresponding alcohols 3b-i in good yields and with absolute syn-selectivity in almost all the cases. It was proposed that the bulky cyclohexylidene moiety of 3 has a significant role in favoring the reduction with k-selectride via Felkin-Anh model. Subsequently, one of the reduction product 3c has been exploited to synthesize the pheromone I of sugarcane weevil.
Synthesis of the rarely obtained syn-adducts in the reaction of organocopper compounds with 2,3-O-isopropylideneglyceraldehyde. Preparation of optically active epoxy alcohols
Organocoppercompounds, prepared from Grignard reagents and copper(I) iodide in tetrahydrofuran-dimethyl sulphide, react with 2,3-O-isopropylideneglyceraldehyde highly stereoselectively (>10:1) affording the rarelyobtained syn-addition products which can be readily converted into opticallyactiveepoxyalcohols, useful intermediates in organic synthesis.