作者:Ken'ichi Takeda、S. Hagishita、M. Sugiura、K. Kitahonoki、I. Ban、S. Miyazaki、K. Kuriyama
DOI:10.1016/s0040-4020(01)92973-4
日期:1970.1
The Diels-Alder reaction of 1,7-, 2,7-, 2,6-, 1,6-dihydroxynaphthalene and 6-bromo-2-naphthol with maleic anhydride was investigated. All of these 2-naphthol derivatives gave exo- and endo-adducts (II and III) except for the bromo-naphthol, from which only endo-adduct was obtained. The assignment of exo or endo configuration was based on lactone formation on NaBH4 reduction possible only from the exo
研究了1,7-,2,7-,2,6-,1,6-二羟基萘和6-溴-2-萘酚与马来酸酐的Diels-Alder反应。所有这些2-萘酚衍生物的给外-和内切-adducts(II和III),除了溴萘酚,其中只有内切得到-adduct。的分配外切或内切配置是基于上的NaBH内酯形成4减少可能只从外异构体,NMR谱的比较,并且在一些情况下,偶极矩的测量。形成的加合物的外/内比率在很宽的范围内变化。