据报道,合成了9,10-双(1,3-二硫醇-2-亚烷基)-9,10-二氢蒽的新衍生物。对化合物4的1 H NMR研究与鞍形分子的两个构象一致,该构象在高温下通过中心环的舟动翻转而相互转换。4的羟甲基取代基易于酯化,分别生成苯甲酰基和2-萘甲酸酯衍生物5a和5b,以及二聚体和三聚体结构6和7分别通过与苯甲酰氯,2-萘甲酰氯,1,4-苯二羰基氯和1,3,5-苯三羰基氯反应来进行。使用双(三甲基甲硅烷基)锂使9-(4,5-二甲基-1,3-二硫醇-2-亚烷基)-10-(1,3-二硫醇-2-亚烷基)-9,10-二氢蒽(8)脱质子化酰胺(LHMDS),然后用氯甲酸甲酯原位淬灭锂化的中间体,得到二酯衍生物10(96%收率),而使用LDA得到单酯9作为主要产物(32%收率)。将二酯10还原为二(羟甲基)衍生物11。通过循环伏安法研究了这些新化合物的溶液电化学:9的酯取代基和10与π框架共轭,导致E ox发
Unsymmetrical and highly-conjugated tetrathiafulvalene and selenatrithiafulvalene derivatives: synthesis and reactions of novel heterocyclic Wittig–Horner reagents
作者:Martin R. Bryce、Adrian J. Moore、Dominique Lorcy、Ajaib S. Dhindsa、Albert Robert
DOI:10.1039/c39900000470
日期:——
Novel 1,3-dithiole and 1-selena-3-thiole Wittig–Homer reagents have been developed and used in the efficient synthesis of a range of new, unsymmetricaltetrathiafulvalene and selenatrithiafulvalenederivatives (6)–(10) and (16); cyclic voltammetry establishes that these molecules are efficient π-donors.
Tetrathiafulvalenes extended with an anthraquinoid spacer (TTFAQ) functionalized diphenylphosphino groups were successfully synthesized. X‐ray structure analysis revealed that the phosphorus atoms adopt the typical distorted tetrahedral geometry. The cyclic voltammetry suggested the coexistence of two different reduction processes depending on the scan rate. It is the first observation in TTFAQs without