Tetraformyltetrathiafulvalene (TFTTF) and acetals, precursors of polyfunctionalized TTFs.
                                
                                    
                                        作者:M. Salle、A. Gorgues、M. Jubault、K. Boubekeur、P. Batail                                    
                                    
                                        DOI:10.1016/s0040-4020(01)92250-1
                                    
                                    
                                        日期:1992.4
                                    
                                    A short synthesis of 1,3-dithiol-2-thiones bearing two aldehyde functionalities, free and/or masked as diethylacetals is described.  They are shown to be convenient precursors for synthesizing di- and tetraformyl-TTF.  When submitted to four-fold nucleophilic attacks, the latter readily affords new substituted derivatives such as the bis-(pyridazino)-TTF 8, the tetrakis-(hydroxymethyl)-TTF 9 and the tetravinylic-TTF 10 whose pi-donor ability has been characterized.