50708-37-7Relevant academic research and scientific papers
Preparation and chemistry of new unsymmetrically substituted tetrachalcogenofulvalenes bearing CN(CH2)2X and HO(CH2)2X groups (X = S or Se)
Binet, Laurent,Fahre, Jean Marc,Montginoul, Claude,Simonsen, Klaus Baek,Becher, Jan
, p. 783 - 788 (2007/10/03)
Several unsymmetrically substituted TTFs bearing the S(CH2)2CN protecting group have been prepared by standard cross coupling in triethyl phosphite from the key intermediate 4,5-bis(2′-cyanqethylsulfanyl)-1,3-dithiol-2-one 1 and an a
SYNTHESES ET CARACTERISATION DES DERIVES METHYLES DU TETRATHIAFULVALENE; NOUVELLE VOIE D'ACCES AU TETRATHIAFULVALENE
Mora, Henri,Fabre, Jean-Marc,Giral, Louis,Montginoul, Claude
, p. 137 - 146 (2007/10/02)
We propose an improved general method for the synthesis of tetrathiafulvalene and its methylated derivatives.TTF is obtained in a five steps preparation offering a high Overall yield. Concerning the unsymmetrically methylated tetrathiafulvalenes, four different procedures are analysed.It is shown the best routes to prepare trimethyltetrathiafulvalene are a WITTIG type reaction, and a selective synthesis based on a WITTIG-HORNER reaction.The monomethyltetrathiafulvalene has been isolated in a 96percent state of purity.
Synthesis of unsimmetrically substituted tetrathiafulvalenes by the "ylid route". Investigations of selectivity.
Fabre, J. M.,Giral, L.,Gouasmia, A.,Cristau, H. J.,Ribeill, Y.
, p. 823 - 826 (2007/10/02)
The selective synthesis of unsimmetrically substituted tetrathiafulvalenes 1 (R R') using phosphonium ylids 2 and dithiolium salts 3 in THF at -80 deg C has been investigated.Several unsymmetrical tetrathiafulvalenes were obtained in good yield. R,R'=CH3; (CH2)4; o-C6H4.It was also shown that the instability of the phosphonium ylid 2 and dithiolylium 3 under the rreaction conditions leads to the formation of variable amounts of symmetrical terathiafulvalenes 1 (R = R').Therefore, purification of the mixture by column chromatography with CS2 as eluent was necessary.
NEW CONDUCTING SALTS CONTAINING UNSYMMETRICAL ?-DONORS
Giral, L.,Fabre, J. M.,Gouasmia, A.
, p. 4315 - 4318 (2007/10/02)
This communication describes the synthesis and the electrochemical properties of a new type of donor containing sulfur or selenium atoms: the dimethyltetramethylenetetraselenafulvalene 1 and the dimethyltetramethylenetetrathiafulvalene 2.The electrical conductivity of their charge transfer complexes and of some of their radical cation salts are reported.
INSERTION OF 1,3-DITHIOLIUM CARBENES INTO N-H BOND OF AMIDES AND IMIDES
Buza, Daniela,Gradowska, Wanda
, p. 1059 - 1069 (2007/10/02)
It was found that 1,3-dithiolium carbenes (4a-d) generated from 2-methoxy-1,3-dithioles (1a-d) were inserted into N-H bond of N-methylbenzamide, acetanilide and succinimide to form N-(1,3-dithiol-2-yl)amides (imides) 8-10, respectively.It was shown that N
REACTIONS OF 1,3-DITHIOLIUM CARBENES IN SITU WITH AROMATIC ALDEHYDES
Buza, Daniela,Gradowska, Wanda
, p. 717 - 729 (2007/10/02)
It was found that 1,3-dithiolium carbenes (3) generated from various 1,3-dithiole derivatives reacted with aromatic aldehydes to form 2-benzoyl-2,2'-(1',3'-dithiolyl)-1,3-dithioles (6).The proposed mechanism of reaction has been discussed.
