PREPARATION OF R-(+)-3,4-DIMETHOXYBENZYL 2-METHOXY-1-NAPHTHYL SULFOXIDE AND DIASTEREOSELECTIVE ADDITION OF LITHIATED ANION OF THIS REAGENT TO CYCLIC NITRONE. ASYMMETRIC SYNTHESIS OF OPTICAL PURE ISOQUINOLINE ALKALOIDS
作者:A. R. Hajipour、M. Hantehzadeh
DOI:10.1080/10426500008042106
日期:2000.6.1
was easily prepared by the reaction of 3.4-dimethoxyben-zylmagnesium chloride 2 with (-)-(S)menthyl 2-methoxy-naphthalenesulfinate 1 in dry benzene. This methodology allows for the synthesis of the isoquinolinealkaloid (R)-(-)-norlaudanosine 8 in three efficient synthetic steps.