Synthesis, X-ray and complete assignments of 1H and 13C nuclear magnetic resonance data for novel dichloro-1,4-dihydro-1,4-epoxynaphtalene derivatives
作者:René Alberto Enríquez-Figueroa、Armando Pineda-Contreras、Octavio Barragán-Mares、Kayim Pineda-Urbina、Nancy Evelyn Magaña-Vergara、Zeferino Gómez-Sandoval、Mikhail A. Tlenkopatchev
DOI:10.1016/j.molstruc.2020.129287
日期:2021.1
Abstract Benzyne from trichlorobenzene has been employed for Diels-Alder cycloaddition with dienes, such as furan and 2,5-dimethylfuran, to synthesized novel dichloro-1,4-dihydro-1,4-epoxynaphtalene derivatives. These compounds have not been characterized or reported. The 1H NMR spectra of cycloadducts were fine resolved, and unambiguous proton chemical shift assignments were based on the multiplicity
摘要 三氯苯中的苯与呋喃和 2,5-二甲基呋喃等二烯进行 Diels-Alder 环加成反应,合成了新型二氯-1,4-二氢-1,4-环氧萘衍生物。这些化合物尚未被表征或报道。环加合物的 1H NMR 光谱得到精细解析,明确的质子化学位移分配基于质子共振的多重模式,并通过来自 COSY、HSQC 和 HMBC 数据的 2D NMR 确认。对 5,6-二氯-1,4-二氢-1,4-环氧萘的晶体进行了计算计算。该化合物在空间群 C2/c 中结晶为单斜晶系,晶胞中有 8 个分子,a = 18.313 (6) A, b = 8.128 (3) A, c = 14.157 (4) A, β = 119.942 ( 9)°,V = 1825.9 (10) A3,Z = 8。