4,5-Bis(methylene)-1,3-dithiole-2-ones from brominated 4,5-dimethyl-1,3-dithiole-2-ones: Precursors for tetramethylene-tetrathiafulvalenes
摘要:
Treatment of di- and tetrabromo-1,3-dithiole-2-ones 7 and 8 with Et(4)NI yields unsubstituted diene 4, trapped as its dimer or a cycloadduct; and dibromodiene 9. Treatment of 8 with DBU gives tribromodiene 10. Spectroscopic evidence indicates that tetramethylene-TTFs are formed by heating 9 and 10 with P(OEt)(3). Diels Alder adducts are formed by 9.
Synthesis and properties of new π-conjugated pyridine ligands with tetrathiafulvalene derivatives and the rhenium(I) tricarbonyl complexes
作者:Gao-Nan Li、Di Wen、Tao Jin、Ya Liao、Jing-Lin Zuo、Xiao-Zeng You
DOI:10.1016/j.tetlet.2010.11.129
日期:2011.2
π-conjugated pyridine ligands with redox-active tetrathiafulvalene (TTF) derivatives, L1–L3, have been synthesized and characterized. The Diels–Alder reaction is the key step for this multistep synthetic strategy. The crystal structures of L1 and L3 have been studied. The electrochemical and spectroscopic properties of these new ligands, as well as the corresponding tricarbonylrhenium(I) complexes (ReL1(CO)3X
A series of 1,3-dithiol-2-onederivativesvia [4 + 2] Diels–Alder cycloaddition reaction of 4,5-bis(dibromomethyl)-1,3-dithiol-2-one with vinyl-substituted compounds have been synthesized. Structures of all the newly synthesized compounds are well supported by spectral data such as 1H-NMR, MS, and elemental analysis. The structures of and have been analyzed by X-ray crystallography.