Alkyl 2,3-dibromo-3-nitroacrylates react with arylthiols and phenols to give earlier unknown representatives of β-functionalized gem-bromonitroethenes, namely, 2-arylsulfanyl- and 2-aryloxy-3-bromo-3-nitroacrylates; their structure was characterized by IR, UV, and NMR (1H, 13C{1H}, HMQC, HMBC) spectroscopy. X-ray diffraction analysis showed that methyl 3-bromo-2-(4-chlorophenylsulfanyl)-3-nitroacrylate has a Z-configuration; the sulfanylbromonitrovinyl fragment in its molecule is relatively coplanar, while the ester group is almost perpendicular to the plane of the C-C double bond.

中文翻译：

---

新型β-功能化的偕溴硝基乙烯——2-芳基硫基-和2-芳氧基-3-溴-3-硝基丙烯酸酯的合成与结构

烷基 2,3-二溴-3-硝基丙烯酸酯与芳硫醇和苯酚反应，得到早期未知的 β-官能化偕溴硝基乙烯，即 2-芳基硫基-和 2-芳氧基-3-溴-3-硝基丙烯酸酯；它们的结构通过 IR、UV 和 NMR（1H、13C{1H}、HMQC、HMBC）光谱表征。X-射线衍射分析表明3-溴-2-(4-氯苯硫基)-3-硝基丙烯酸甲酯具有Z-构型；其分子中的磺基溴硝基乙烯基片段相对共面，而酯基几乎垂直于CC双键的平面。