Synthesis and n.m.r. spectra of 2,6- and 2,4-diaryl-3,7-dioxabicyclo-[3.3.0]octanes
作者:Andrew Pelter、Robert S. Ward、Derrick J. Watson、Ibiba R. Jack
DOI:10.1039/p19820000183
日期:——
A series of isomeric 2,6- and 2,4-diaryl-3,7-dioxabicyclo[3.3.0]octanes have been prepared via the corresponding threo, and erythro-dioxo-diesters. Comparison of their 1H and 13C n.m.r. spectra reveals small differences in chemical shifts and coupling constants which could be diagnostic in assigning structures to such compounds. The structure of 4-hydroxysesamin has been confirmed by direct correlation
经由相应的苏式和赤式-二氧代二酯制备了一系列的异构体2,6-和2,4-二芳基-3,7-二氧杂双环[3.3.0]辛烷。通过比较它们的1 H和13 C nmr光谱,可以发现化学位移和偶合常数之间的细微差别,这对于将化合物分配给此类化合物具有诊断意义。4-羟基芝麻素的结构已通过与芝麻素的直接相关得到证实。