Reactions of carbon acids and 1,3-dipoles in the presence of ionic liquids

Prospective Symbiosis of Green Chemistry and Energetic Materials

“…obtainedR DX nanoparticles by the rapid expansion of its solution in scCO 2 . However,t his correlation became weaker at higher pressures (23)(24)(25)(26)(27)(28)(29)(30). As ar esult, supersaturation is attained faster upon expansion to give the desired particles of RDX.…”

“…The pronounced acceleration effect of ILs has been observedi nD iels-Alder, [19] Michael addition, [20] Knoevenagel, [21] Baylis-Hillman, [22] crosscoupling, [23] and cyclocondensation reactions. [26][27][28][29] Supercritical CO 2 (scCO 2 )h as been often used in chemistry and chemical engineering as a green extracting agent of useful substances from plant and animal raw materials, [30] as an inexpensive and efficient eluent Ag lobal increasei ne nvironmental pollutiond emands the development of new "cleaner" chemical processes. [26][27][28][29] Supercritical CO 2 (scCO 2 )h as been often used in chemistry and chemical engineering as a green extracting agent of useful substances from plant and animal raw materials, [30] as an inexpensive and efficient eluent Ag lobal increasei ne nvironmental pollutiond emands the development of new "cleaner" chemical processes.…”

Ionic Liquids as Unique Solvents in One‐Pot Synthesis of 4‐(N,2,2,2‐Tetranitroethylamino)‐3‐R‐Furazans

“…Evidently, that deviation of the NNO 2 group in the methyl derivative 9 b is more pronounced than that in 9 c, whereas in 9 d, both NNO 2 groups are deviated in opposite directions relative to the furazan ring. The N3 atom in cyano derivative 9 c has nearly planar geometry (the sum of bond angles is 359.4(2) 8), whereas in compound 9 b the corresponding sum is equal to 350.8(2) 8 and the bonds N3 À N4 and N3 À C1 are somewhat longer (1.4272 (10) , 1.4132(10) for 9 b, and 1.3891 (11) , 1.3953 (11) for 9 c, respectively). In the case of compound 9 d, the orientation of the NNO 2 moiety at the C1 atom resembles that of compound 9 c (sum of bond angles at N3 is 359.7(6) 8, bond lengths of N3ÀN4 and N3À C1 are 1.379(3) and 1.402(4) , respectively), whereas the orientation of the NNO 2 moiety attached to the C2 atom of 9 d is similar to that of 9 b (sum of bond angles at N8 is 348.2(6) 8, bond lengths of N8 À N9 and N8 À C2 are 1.441(3) and 1.412(4) , respectively).…”

“…Over the last decades, ionic liquids (ILs) have been used as "green" solvents or catalysts for a wide variety of organic reactions due to their remarkable properties such as high solvating ability, negligible vapor pressure, non-flammability, high thermal and chemical stability, and recyclability. [11] With these advantages, the ILs have created an increased interest in chemistry of energetic materials in recent years, specifically because of their ability to reduce the explosion risk of chemical syntheses in the area. [12] Recently, our group and others described the straightforward use of ILs as inert reaction media for activation of poor nucleophiles, [8c, 13] and N-nitration of amines.…”

CAN-mediated new, regioselective one-pot access to bicyclic cationic structures with 2,3-dihydro-1H-pyrazolo[1,2-a]pyrazol-4-ium core

“…This aromatization could be performed by two pathways: (1) initial oxidative detachment of hydride ion followed by dehydrobromination (pathway 1) or (2) 4,5). We expected that Br -would act in this reaction as the anion X and atmospheric oxygen would serve as the oxidant (Scheme 5).…”