Acid mediated intramolecular cyclization of π-donors bearing two vicinal “cis”-branched, 1,4-dithiafulven-6-yl substituents on a CC bond
摘要:
Cis-ethylenic analogues 1 and ortho-benzenic analogues 2 of TTF undergo a rapid acid mediated intramolecular cyclization into the corresponding cycloisomers 1' and 2' whose structures are confirmed by X-ray diffraction; as shown by cyclic voltammetry, compounds 1 may act as convenient precursors of organic metals.
The synthesis and electrochemical and photochromic properties of new 3,3-diphenyl-8-(1,4-dithiafulven-6-yl)-[3H]-naphtho[2,1-b]pyran derivatives containing differently substituted dithiafulvenyl units are described. An example of electrochemical dimerization is shown which gives access to electroactive bichromophoric systems. Such systems could allow the study of the interplay of photochromic and electrochemical
含有不同取代的二硫富烯基乙烯基单元的新3,3-二苯基-8-(1,4-二硫富烯基-6-基)-[ 3H ]-萘[ 2,1- b ]吡喃衍生物的合成,电化学和光致变色性质为描述。示出了电化学二聚化的一个实例,该实例提供了进入电活性双发色体系的途径。这样的系统可以研究光致变色和电化学性质的相互作用。
2,5-Bis(1,4-dithiafulven-6-yl) furans, thiophenes and N-methyl pyrroles as extended analogues of tetrathiafulvalene
The title compounds are synthesized by Wittig or Wittig-Horner reactions between the corresponding furan, thiophen and N-methyl-pyrrole-2,5-dicarbaldehydes and P-reagents W or P bearing the 1,3-dithiol-2-ylidene moiety adequately substituted al the 4,5-positions; thanks to usual and thin layer cyclic voltammetry, they are shown to possess good pi-donor abilities.