Structural elucidation of dioxa-cage compounds from tetrahydroisobenzofuran-1(3<i>H</i>
)-one: analysis of NMR data and GIAO chemical shifts calculations
作者:Gabriela da Costa Resende、Elson Santiago Alvarenga
DOI:10.1002/mrc.4483
日期:2016.12
compounds were unexpectedly isolated during bromination, chlorination and epoxidation reactions of the 3‐hydroxy‐3a,4,7,7a‐tetrahydro‐4,7‐methanoisobenzofuran‐1(3H)‐one. After careful analysis of the NMR data, the chemical shifts of the isolated and the expected products were predicted by theoretical calculations using density functional theory and gauge including atomic orbitals. The best correlation between
近年来,多环化合物,尤其是二氧杂笼,引起了广泛的关注。在我们的工作中,在 3-羟基-3a,4 的溴化、氯化和环氧化反应过程中意外地分离出了一系列 9β-取代的 3-氧代-4,11-二氧杂四环[5.2.1.15,8.02,6]十一烷化合物, 7,7a-四氢-4,7-methanoisobenzofuran-1(3H)-one。在仔细分析 NMR 数据后,通过使用密度泛函理论和包括原子轨道的规范的理论计算来预测分离产物和预期产物的化学位移。通过比较平均绝对误差和应用 DP4 概率方法来评估计算数据和实验数据之间的最佳相关性。两种方法的结果都表明了正确的结构解析。版权所有 © 2016 John Wiley & Sons, Ltd.