5022-29-7Relevant academic research and scientific papers
Preparation method of N-alkyl phthalimide
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Paragraph 0035-0036, (2021/03/13)
The invention discloses a preparation method of N-alkyl phthalimide. The method comprises the steps: taking phthalic anhydride as a raw material, taking an aqueous solution of alkylamine as an imidization reagent ( no other reagents do not need to be added), and directly synthesizing the N-alkyl phthalimide, wherein the yield is high (96% or above), and the purity is high (99% or above). The preparation method is loose in reaction condition, simple in step and easy to implement; no organic solvent is needed, no other substances are discharged except water, and the method is green, free of pollution and suitable for industrial production.
Preparation method of N - alkyl -4 -nitrophthalimide
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Paragraph 0043-0044, (2021/10/27)
The invention discloses a preparation method of N - alkyl -4 -nitrophthalimide, which comprises the following steps of 1) mixing phthalic anhydride, alkyl aldehyde and inorganic amine, reacting under the action of hydrogen, cooling and crystallizing, and drying to obtain N -alkyl phthalimide. Step 2) The 1 alkylphthalimide obtained in step N -) is subjected to nitration reaction, and the product is purified and dried to obtain the N -alkyl -4 -nitrophthalimide. The alkyl aldehyde in step 1) is preferably an alkyl aldehyde of carbon 1 - 4. The preparation method has the advantages of wide raw material source, low price, simple process, easiness in large-scale production and the like. Through one-step synthesis, the reaction efficiency is high, the device is simple and easy to operate, and green and environment-friendly.
Binuclear Pd(I)-Pd(I) Catalysis Assisted by Iodide Ligands for Selective Hydroformylation of Alkenes and Alkynes
Zhang, Yang,Torker, Sebastian,Sigrist, Michel,Bregovi?, Nikola,Dydio, Pawe?
supporting information, p. 18251 - 18265 (2020/11/02)
Since its discovery in 1938, hydroformylation has been thoroughly investigated and broadly applied in industry (>107 metric ton yearly). However, the ability to precisely control its regioselectivity with well-established Rh- or Co-catalysts has thus far proven elusive, thereby limiting access to many synthetically valuable aldehydes. Pd-catalysts represent an appealing alternative, yet their use remains sparse due to undesired side-processes. Here, we report a highly selective and exceptionally active catalyst system that is driven by a novel activation strategy and features a unique Pd(I)-Pd(I) mechanism, involving an iodide-assisted binuclear step to release the product. This method enables β-selective hydroformylation of a large range of alkenes and alkynes, including sensitive starting materials. Its utility is demonstrated in the synthesis of antiobesity drug Rimonabant and anti-HIV agent PNU-32945. In a broader context, the new mechanistic understanding enables the development of other carbonylation reactions of high importance to chemical industry.
Synthesis, molecular docking, cytotoxicity and antioxidant activity evaluation of isoindoline-1,3-dione derivatives
Kumar, Palanichamy Santhosh,Kumar, Kuruba Bharath,Obadiah, Asir,Kumar, Suluvoy Jagadish,Mohanapriya, Raman,Durairaj, Arulappan,Ramanathan, Subramanian,Vasanthkumar, Samuel
, p. 2548 - 2556 (2019/10/02)
A variety of amines have been employed to functionalize isobenzofuran-1,3-dione to obtain isoindoline-1,3-dione derivatives in the base free conditions. All the synthesized compounds are screened for their bioactivity through molecular docking, cytotoxicity (against HeLa) and antioxidant activity. ABTS and DPPH are employed to assess the antioxidant activity. Among the synthesized isoindoline-1,3-dione derivatives (3a-k), compound 3e has showed the best antioxidant activity and also exhibited better binding energy when docked with caspase-3 protein. Cytotoxicity of the synthesized compounds was studied against cervical cancer cell line (HeLa) and compound 3e has displayed better activity than other isoindoline derivatives.
Biomolecule-derived supported cobalt nanoparticles for hydrogenation of industrial olefins, natural oils and more in water
Pews-Davtyan, Anahit,Scharnagl, Florian Korbinian,Hertrich, Maximilian Franz,Kreyenschulte, Carsten,Bartling, Stephan,Lund, Henrik,Jackstell, Ralf,Beller, Matthias
supporting information, p. 5104 - 5112 (2019/09/30)
Catalytic hydrogenation of olefins using noble metal catalysts or pyrophoric RANEY nickel is of high importance in the chemical industry. From the point of view of green and sustainable chemistry, design and development of Earth-abundant, less toxic, and more environmentally friendly catalysts are highly desirable. Herein, we report the convenient preparation of active cobalt catalysts and their application in hydrogenations of a wide range of terminal and internal carbon-carbon double bonds in water under mild conditions. Catalysts are prepared on multi-gram scale by pyrolysis of cobalt acetate and uracil, guanine, adenine or l-tryptophan. The most active material Co-Ura/C-600 showed good productivity in industrially relevant hydrogenation of diisobutene to isooctane and in natural oil hardening.
DIELS- ALDER RING-OPENING PROCESS
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Page/Page column 20, (2019/11/19)
The invention is directed to a process for the ring-opening of a cycloadduct of formula I obtainable from a reaction of a furanic compound and a diene, said process comprising contacting the cycloadduct with an acidic mixture comprising sulfuric acid and an activating agent to obtain a ring-opened product. The present invention is particularly directed a continuous process.
Microwave-assisted synthesis method for ethylation reaction
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Paragraph 0012, (2019/10/05)
The invention relates to a microwave-assisted synthesis method for an ethylation reaction. The method is characterized in that a reaction substrate is in an organic solvent, trifluoroacetic acid ethyl ester is taken as an ethylation reagent, in the presence of an alkali, microwave-assisted heating is carried out for 2 minutes, and a corresponding ethylation product can be obtained. The invention provides a new method for the ethylation reaction. The reaction rate of the method is several times higher than that of a traditional method, the operation is simple and convenient, the cost is low, the reaction time is short, the application range of the substrate is wide, the use of the expensive or hypertoxic ethylation reagent can also be avoided, and the method has higher application value.
PPh3/I2/HCOOH: An efficient CO source for the synthesis of phthalimides
Wang, Yingying,Zhou, Yang,Lei, Min,Hou, Jinjun,Jin, Qinghao,Guo, Dean,Wu, Wanying
supporting information, p. 1180 - 1185 (2019/01/26)
A straightforward and general method has been developed for the synthesis of phthalimide derivatives from 2-iodobenzamides and PPh3/I2/HCOOH in the presence of a catalytic amount of Pd(OAc)2. The reaction results demonstrate that PPh3/I2/HCOOH is a facile, efficient and safe CO source. The whole process is carried out in toluene at 80 °C and furnishes the desired products in good to excellent yields.
Normal Alpha Olefin Synthesis Using Dehydroformylation or Dehydroxymethylation
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Paragraph 0127; 0128; 0129, (2019/09/06)
The present invention discloses processes for producing normal alpha olefins, such as 1-hexene, 1-octene, 1-decene, and 1-dodecene in a multistep synthesis scheme from another normal alpha olefin. Also disclosed are reactions for converting aldehydes, primary alcohols, and terminal vicinal diols into normal alpha olefins.
Oxidative Dehydroxymethylation of Alcohols to Produce Olefins
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Paragraph 0058, (2019/09/06)
Catalyst compositions for the conversion of aldehyde compounds and primary alcohol compounds to olefins are disclosed herein. Reactions include oxidative dehydroxymethylation processes and oxidative dehydroformylation methods, which are beneficially conducted in the presence of a sacrificial acceptor of H2 gas, such as N,N-dimethylacrylamide.
