42076-28-8Relevant articles and documents
Tkachenko et al.
, (1974)
Anti-migration of Nitrogen-rich N-Heterocyclic Ferrocenes and Their Combustion Catalytic Properties in the Thermal Decomposition of Energetic Oxidizers
Shi, Xiaoling,Yang, Lufei,Jiang, Liping,Bi, Fuqiang,Zhang, Guofang
, (2021/12/14)
To retard high migration tendency of alkylferrocene-based burning rate catalysts and ameliorate their combustion catalytic activity, twenty new nitrogen-rich N-heterocyclic ferrocenyl compounds 1–20 were synthesized by click reaction and characterized by NMR, UV-Vis, FT-IR, ESI-MS, etc. Six compounds were structurally confirmed by single crystal X-ray diffraction additionally. TG studies showed that the new ferrocenyl compounds are highly thermal stable. Cyclic voltammetry results implied that some new ferrocenyl compounds exhibit reversible electrochemical behavior, which are favorable for their combustion catalytic performance in the composite solid propellants. The anti-migration tests confirmed that the new ferrocenyl compounds exhibit neglectable migration trends after four-week aging on comparison with ferrocene and catocene. The catalytic combustion tests of AP, RDX and HMX over the compounds 1–20 indicated that these N-heterocyclic ferrocenes are all highly active for improving thermal degradation of AP and RDX and more active than the aniline-derived counterparts prepared by click reaction.
Sustainable Synthesis of 2-Hydroxymethylbenzimidazoles using D-Fructose as a C2 Synthon
Raja, Dineshkumar,Philips, Abigail,Sundaramurthy, Devikala,Chandru Senadi, Gopal
supporting information, p. 3754 - 3759 (2021/10/14)
D-fructose, a biomass-derived carbohydrate has been identified as an environmentally benign C2 synthon in the preparation of synthetically useful 2-hydroxymethylbenzimidazole derivatives by coupling with 1,2-phenylenediamines. Proof of concept was established by synthesizing 23 examples using BF3.OEt2 (20 mol%), TBHP (5.5 M, decane) (1.0 equiv.) in CH3CN at 90 °C for 1 h. The pivotal features of this method include metal-free conditions, short time, good functional group tolerance, gram scale feasibility and the synthesis of benzimidazole fused 1,4-oxazine. Control studies with conventional C2 synthons did not produce the desired product, thus suggesting a new reaction pathway from D-fructose.
Metal-Free Synthesis of Benzimidazoles via Oxidative Cyclization of d -Glucose with o-Phenylenediamines in Water
Raja, Dineshkumar,Philips, Abigail,Palani, Pushbaraj,Lin, Wei-Yu,Devikala, Sundaramurthy,Senadi, Gopal Chandru
, p. 11531 - 11540 (2020/10/12)
d-Glucose has been identified as an efficient C1 synthon in the synthesis of benzimidazoles from o-phenylenediamines via an oxidative cyclization strategy. Isotopic studies with 13C6-d-glucose and D2O unambiguously confirmed the source of methine. The notable features of this method include the following: broad functional group tolerance, a biorenewable methine source, excellent reaction yields, a short reaction time, water as an environmentally benign solvent, and the synthesis of vitamin B12 component on the gram scale.
