regioselectivity being better for the trans isomers) and the results can be interpreted in terms of directive effects exerted by the C-1 hydroxyl group. However, complete C-3 selectivity was observed in the reactions of 1 and 2 with AlMe3, indicating a complexation effect of the C-4 benzyloxy group in those cases.
研究了
氢化物和甲基转移试剂对反式和顺式
叠氮基醇1(1')和2(2')的亲核开环。通常,观察到良好至优异的C-2选择性(对反式异构体的区域选择性更好),其结果可以用C-1羟基所产生的指导作用来解释。然而,在1和2与AlMe 3的反应中观察到完全的C-3选择性,表明在那些情况下C-4苄氧基的络合作用。