55915-70-3Relevant academic research and scientific papers
Trace Detection of Hydrogen Peroxide via Dynamic Double Emulsions
Fong, Darryl,Swager, Timothy M.
supporting information, (2021/04/07)
Hydrogen peroxide is a dynamic signaling molecule in biological systems. We report herein a versatile double emulsion sensor that can detect femtomolar quantities of aqueous hydrogen peroxide. The mechanism responsible for this sensitivity is a peroxide induced change in double emulsion structure, which results in a modified directional emission from dyes dissolved in the high index organic phase. The morphology (structure) of the double emulsion is controlled via interfacial tensions and a methyltrioxorhenium catalyzed sulfide oxidation results in an enhancement of the surfactant effectiveness. The incipient polar sulfoxide induced decrease of the interfacial tension at the organic-water (O-W) interface results in an increased interfacial area between the organic phase and water and a diminished emission perpendicular to the supporting substrate. The modularity of our sensory system is demonstrated through cascade catalysis between methyltrioxorhenium and oxidase enzymes, with the latter producing hydrogen peroxide as a byproduct to enable for the selective and sensitive detection of molecular and ionic enzymatic substrates.
Simple salts of abundant metals (Fe, Bi, and Ti) supported on montmorillonite as efficient and recyclable catalysts for regioselective intramolecular and intermolecular hydroalkoxylation reactions of double bonds and tandem processes
Notar Francesco, Irene,Cacciuttolo, Bastien,Pascu, Oana,Aymonier, Cyril,Pucheault, Mathieu,Antoniotti, Sylvain
, p. 19807 - 19818 (2016/03/01)
The transfer of catalytic hydroalkoxylation reactions of olefins from homogeneous to heterogeneous conditions has been studied using two types of solid catalysts, namely montmorillonite (MMT) doped with metal cations and metal nanoparticles supported on oxides. In the case of intramolecular reactions, 38-99% yields of cyclic ethers have been obtained using Fe-MMT and Bi-MMT both in CH3NO2 and dimethyl carbonate (DMC) compared with other supported metal salts or metal nanoparticles. In the case of more challenging intermolecular reactions, conversions up to 72% and yields up to 54% were obtained with metal-doped MMT as well, such as Fe-, Bi-, and Ti-MMT. In this paper, we detail the substrate scope and limitations for both classes of reactions and tandem processes, their transposition in flow and some mechanistic insights concerning the active species, in processes identified as truly heterogeneously catalysed. As a general trend, it was observed that trisubstituted double bonds allowed the best results both in intra- and intermolecular reactions. The transfer of homogeneous catalysts onto heterogeneous ones in the case of Fe-MMT and Bi-MMT was successful and even allowed enhanced catalytic activities in the case of Bi-MMT.
A new practical synthesis of (+)-grandisol from (+)-citronellol using an intramolecular carbenoid cyclization
Monteiro, Hugo J.,Zukerman-Schpector, Julio
, p. 3879 - 3888 (2007/10/03)
A new practical 10 step synthesis of (1S,2R)-2-acetyl-1-methylcyclobutaneacetic acid 15 is reported, which has as a key step a rhodium catalyzed intramolecular carbenoid cyclization of the α-diazo-β-ketosulfone 5, readily available from (+)-citronellol 2. Since 15 has already been converted into (+)-grandisol 1, the major pheromone of the cotton boll-weevil Anthonomus grandis, the described preparation constitutes a new formal synthesis of the optically active pheromone.
OZONOLYSIS OF ALKENES AND REACTIONS OF POLYFUNCTIONAL COMPOUNDS. XLVII. SYNTHESIS OF 2,6-DIMETHYL-2(E)-OCTENE-1,8-DIOL DIESTERS, WHICH HAVE JUVENOID ACTIVITY
Odinokov, V. N.,Kukovinets, O. S.,Zainullin, R. A.,Kasradze, V. G.,Lolidze, A. V.,Tolstikov, G. A.
, p. 919 - 922 (2007/10/02)
From levulinaldehyde dimethyl acetal, the product of the ozonolysis of 1,5-dimethyl-1,5-cyclooctadiene, 2,6-dimethyl-2(E)-octene-1,8-diol diesters were synthesized.The latter are active juvenoids toward mosquito larvae.
Products Active on Mosquitoes: Part III - Synthesis of Biologically Active 3,7-Dimethyl-6-octene-1,8-diol Diethers
Phadnis, A. P.,Nanda, B.,Patwardhan, Sarita A.,Powar, P.,Sharma, R. N.
, p. 867 - 870 (2007/10/02)
Mixed diethers (IIIa-s) have been prepared from 8-hydroxy-monoethers (IIa-g) which in turn have been obtained from citronellyl ethers (Ia-g) by selenium oxidation.Most of the diethers are oviposition deterrent, while some of them also show inhibition towards the development of mosquitoes.
