摘要:
                                Alpha-Alkoxy-beta,gamma-unsaturated methyl esters of structural type 1 undergo an alkoxy-directed hydroboration with the mild hydroborating reagent borane-methyl sulfide complex (BH3-SMe2) in THF from 0-degrees-C to room temperature, and after standard alkaline hydrogen peroxide oxidation the 1,3-diol product 2 is produced with useful levels of selectivity favoring the anti diastereomer.