Stereospecificity in Diels–Alder reactions of dienes and dienophiles derived from methyl 4,6-O-benzylidene-α-<scp>D</scp>-glucopyranoside
作者:J. Cristobal Lopez、Eric Lameignere、Gabor Lukacs
DOI:10.1039/c39880000706
日期:——
Conjugated enals (1) and (2) and dienes (3) and (4) derived from methyl 4,6-O-benzylidene-α-D-glucopyranoside underwent highly efficient (yields ranging from 75 to 95%) Diels–Alder reaction with complete facial specificity with butadiene, dimethyl acetylenedicarboxylate, and maleic anhydride leading exclusively to endo adducts with the latter.
衍生自甲基4,6 - O-亚苄基-α- D-吡喃葡萄糖苷的共轭Enals(1)和(2)以及二烯(3)和(4)进行了高效反应(产率为75%到95%)Diels-Alder反应与丁二烯,乙炔二甲酸二甲酯和顺丁烯二酸酐具有完全的面部特异性,从而导致后者的内加合物。