16383-89-4Relevant articles and documents
PH triggered smart organogel from DCDHF-Hydrazone molecular switch
Khattab, Tawfik A.,Tiu, Brylee David B.,Adas, Sonya,Bunge, Scott D.,Advincula, Rigoberto C.
, p. 327 - 336 (2016)
The design, synthesis and photophysical properties of a Low Molecular Weight pH-responsive Gelator (LMWG) based on alkoxy group functionalized DCDHF-Hydrazones (DCDHF-H) are described. A straightforward synthesis of DCDHF-Hydrazone (DCDHF-H) chromophores was achieved via simple azo-coupling starting from 2-(dicyanomethylene)-2,5-dihydro-4,5,5-trimethylfuran-3-carbonitrile and alkoxy bearing aryl diazonium chloride derivatives. The DCDHF-H efficiently gelate selected organic solvents and reversibly respond to pH stimuli with a gel-sol conversion and an associated color change from yellow to purple. Self-assembly of these molecules, as indicated by X-ray crystallography, occurs via cooperative π-π stacking and van der Waals interactions producing gelation in some pure and mixed organic solvents. Furthermore, the presence of acidic or alkaline gases leads to a dramatic change in the rheological properties with potential applications in areas such as gas detection devices and drug release systems. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies of the xerogels obtained from n-propanol provide visual images revealing the formation of fibrous nanostructures.
A convenient method to aniline compounds using microwave-assisted transfer hydrogenation
Chapman, Nicholas,Conway, Benjamin,O'Grady, Fiona,Wall, Michael D.
, p. 1043 - 1046 (2007/10/03)
The reduction of mononitro and dinitro aromatic compounds to their aniline analogues using microwave-assisted transfer hydrogenation has been demonstrated. The optimised conditions used, with some examples, are described herein. Georg Thieme Verlag Stuttgart.
Quinone Imine Route to Benzimidazol-2-ylcarbamates. Part 3. Effect of Extension of Conjugation in the Quinone Imine.
Divakar, Kikkeri J.,Gaikwad Balkrishna V.,Tampal, Nilufer F.,Rajappa, Srinivasachari
, p. 1687 - 1697 (2007/10/02)
5-Aminobenzimidazol-2-ylcarbamates (11) and (17), in which the amine is linked to position 3 of 1,2-benzisothiazole 1,1-dioxide have been synthesised in good yields from the guanidines (10) and (16) by oxidative cyclisation.The cyclisation is regiospecific.It is likely that quinone imines with extended conjugation are intermediates in this reaction.