100719-44-6Relevant articles and documents
A thiourea-functionalized metal-organic macrocycle for the catalysis of Michael additions and prominent size-selective effect
Yang, Lu,Zhao, Liang,Zhou, Zhen,He, Cheng,Sun, Hui,Duan, Chunying
, p. 4086 - 4092 (2017/03/30)
A discrete tetranuclear thiourea-based metal-organic macrocycle (MOM) with a large size was constructed by a well-designed organic ligand and nickel(ii) ions via self-assembly. Incorporating thiourea groups as hydrogen-bond donors into a metal-organic com
Helical Oligourea Foldamers as Powerful Hydrogen Bonding Catalysts for Enantioselective C-C Bond-Forming Reactions
Bécart, Diane,Diemer, Vincent,Salaün, Arnaud,Oiarbide, Mikel,Nelli, Yella Reddy,Kauffmann, Brice,Fischer, Lucile,Palomo, Claudio,Guichard, Gilles
supporting information, p. 12524 - 12532 (2017/09/23)
Substantial progress has been made toward the development of metal-free catalysts of enantioselective transformations, yet the discovery of organic catalysts effective at low catalyst loadings remains a major challenge. Here we report a novel synergistic
Urea derivative or pharmacologically acceptable salt thereof
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Paragraph 0313; 0314; 0330; 0331, (2016/10/08)
To provide a compound having a formyl peptide receptor-like 1 (FPRL1) agonist effect. The present invention relates to a compound represented by general formula (I) or a pharmacologically acceptable salt thereof. The present invention also relates to a pharmaceutical composition which comprises the compound represented by general formula (I) or the pharmacologically acceptable salt thereof, and pharmaceutical use thereof.
Iodine-promoted synthesis of 3-arylindolizine-1-carboxylates from 2-(2-nitro-1-arylethyl)malonates and pyridine
Li, Yun,Zhou, Zhengquan,Ye, Weijian,Liu, Juanjuan,Yao, Juan,Wang, Cunde
, p. 526 - 530 (2013/10/22)
An efficient and straightforward one-pot synthetic protocol has been developed for the synthesis of 3-arylindolizine- 1-carboxylates via 1,3-dipolar annulation of 2-(2-nitro-1-arylethyl)malonates with pyridine and subsequent aromatisation in the presence of molecular iodine. The structure of methyl 3-(4-methoxyphenyl)indolizine-1-carboxylate (2a) and methyl 3-iodo-2-(4- nitrophenyl)indolizine-1-carboxylate (2f) was further confirmed by X-ray single crystal analysis. Website
An expedient and green protocol for the Michael addition of malonates, diketones and p-keto esters to the nitrostyrenes
Agarwal, Jyoti,Naganaboina, Ram Tilak,Peddinli, Rama Krishna
, p. 511 - 518 (2013/06/05)
A novel methodology has been developed for the rapid synthesis of functionalized nitroalkanes by the addition of less reactive carbon nucleophiles such as malonate esters, acetylacetone and ethyl acetoacetate to various r/ms-p-nitrostyrenes under solvent-
Immobilization of 1,5,7-triazabicyclo [4.4.0] dec-5-ene over mesoporous materials: An efficient catalyst for Michael-addition reactions under solvent-free condition
Kalita, Pranjal,Kumar, Rajiv
experimental part, p. 250 - 258 (2012/01/05)
Immobilization of 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD, a bicylic guanidine base) over mesoporous material like SBA-15 has been found to be an excellent catalyst for Michael-addition of β-nitro styrene with malonate. The reactions were performed und
Highly enantioselective Michael addition of malonates to nitroolefins catalyzed by chiral bifunctional tertiary amine-thioureas based on saccharides
Li, Xiao-Juan,Liu, Kun,Ma, Hai,Nie, Jing,Ma, Jun-An
scheme or table, p. 3242 - 3246 (2009/06/25)
A series of saccharide-derived bifunctional tertiary amine-thioureas for the asymmetric Michael addition reaction have been designed and synthesized. The addition products between malonates and various nitroolefins were obtained in high yields (up to 99%)
Mechanism and application of a microcapsule enabled multicatalyst reaction
Poe, Sarah L.,Kobaslija, Muris,McQuade, D. Tyler
, p. 9216 - 9221 (2008/02/11)
In this paper, we describe the development and application of a multistep one-pot reaction that is made possible by the site isolation of two otherwise incompatible catalysts. We prepared a microencapsulated amine catalyst by interfacial polymerization and used it in conjunction with a nickel-based catalyst for the transformation of an aldehyde to a Michael adduct via a nitroalkene intermediate. The amine-catalyzed conversion of an aldehyde to a nitroalkene was found to proceed through an imine rather than a nitroalcohol. Kinetic studies indicated that the reaction is first order in both the nickel catalyst and the shell of the encapsulated amine catalyst. Furthermore, we provide evidence against interaction between amine and nickel catalysts and present kinetic data that demonstrates that there is a rate enhancement of the Michael addition due to the urea groups on the surface of the microencapsulated catalyst. We applied our one-pot reaction to the development of a new synthetic route for pregabalin that proceeds with an overall yield of 74%.
An enantioselective Michael addition of malonate to nitroalkenes catalyzed by low loading demethylquinine salts in water
Chen, Fu-Xin,Shao, Cheng,Wang, Quan,Gong, Pin,Zhang, Dong-Yan,Zhang, Bang-Zhi,Wang, Rui
, p. 8456 - 8459 (2008/03/13)
An enantioselective Michael addition of malonate to nitroalkenes is efficiently catalyzed by low loading demethylquinine salts in water; the yield range from 49% to 93% and the ee up to 90%.
The study of reaction mechanism for the transformation of nitronate into nitrile by phosphorus trichloride
Tu, Zhijay,Jang, Yaochung,Lin, Chunchi,Liu, Ju-Tsung,Hsu, Jianming,Sastry,Yao, Ching-Fa
, p. 10541 - 10551 (2007/10/03)
Nitronate was generated using β-nitrostyrene and the anion of dimethyl malonate in THF at 0°C. Subsequent treatment with PCl3 in the presence/absence of DMAP either in THF or pyridine afforded nitroalkane, chloroxime, and nitrile. Pyridine, THF, and THF-pyridine co-solvent as solvents were investigated under different conditions. With different anions of malonates containing dipolarphiles, cyclic compounds were obtained as major products indicating nitrile oxides were generated during the reaction. Based on the results, compared to that of the one reported in literature, a plausible mechanism involving nitrile oxide intermediate was proposed.