1785-02-0Relevant articles and documents
Lai, Richard,Mabille, Sylvain,Croux, Alain,Bot, Sylvie Le
, p. 463 - 466 (1991)
Phosphorylation of isocyanates and aldehydes mediated by multifunctional n-phosphine oxide-substituted imidazolylidenes
Hoshimoto, Yoichi,Asada, Takahiro,Hazra, Sunit,Ohashi, Masato,Ogoshi, Sensuke
, p. 1211 - 1213 (2017)
The direct syntheses of imidic-phosphinic mixed anhydrides and phosphinates were accomplished via phosphorylation of isocyanates or aldehydes with N-phosphine oxide-substituted imidazolylidenes (PoxIms) that are equipped with both nucle-ophilic carbene an
Development of high-performance networked polymers consisting of isocyanurate structures based on selective cyclotrimerization of isocyanates
Moritsugu, Masaki,Sudo, Atsushi,Endo, Takeshi
, p. 5186 - 5191 (2011)
Selective and quantitative cyclotrimerization of p-tolylisocyanate proceeded by using sodium p-toluenesulfinate as a catalyst and 1,3-dimethylimidazolidinone as a solvent. Exploitation of this system to the cyclotrimerization of methylene diphenyl 4,4′-di
New Insights in Frustrated Lewis Pair Chemistry with Azides
Boom, Devin H. A.,Jupp, Andrew R.,Nieger, Martin,Ehlers, Andreas W.,Slootweg, J. Chris
, p. 13299 - 13308 (2019)
The geminal frustrated Lewis pair (FLP) tBu2PCH2BPh2 (1) reacts with phenyl-, mesityl-, and tert-butyl azide affording, respectively, six, five, and four-membered rings as isolable products. DFT calculations revealed that
Transition-metal-mediated activation of arylisocyanates in supercritical carbon dioxide
Montilla, Francisco,Clara, Elisabete,Avilés, Teresa,Casimiro, Teresa,Aguiar Ricardo, Ana,Nunes Da Ponte, Manuel
, p. 227 - 232 (2001)
The reactivity of arylisocyanates in supercritical carbon dioxide (scCO2) was studied using the easily available complexes CpCo(CO)2, CpCoPPh3Me2 and Ni(cod)2 as catalysts. A study of the solubility o
'Push-Pull' and spirobicyclic structures by reacting N-methyl cyclic ketene-N,X (X=S, O)-acetals with isocyanates and isothiocyanates
Zhou, Aihua,Cao, Liwei,Li, Haiqing,Liu, Zhuqing,Cho, Hosouk,Henry, William P.,Pittman, Jr., Charles U.
, p. 4188 - 4200 (2006)
Nucleophilic N-methyl cyclic ketene-N,X (X=S, O)-acetals can react with electrophilic aryl isocyanates and aryl isothiocyanates to form 'push-pull' mono-adducts, di-adducts and spirobicyclic 6/5 ring compounds.
Generation of low-valent alkoxy niobium from Nb(OEt)5 and Grignard reagents and their use as catalysts in the cyclotrimerization of isocyanates
Ozaki, Makoto,Obora, Yasushi,Tada, Yusuke,Ishii, Yasutaka
, p. 109 - 113 (2013)
A new highly active low-valent alkoxyniobium species has been developed following the reaction of Nb(OEt)5 with Grignard reagent such as i-PrMgCl or EtMgCl, with the material behaving as an efficient catalyst for cyclotrimerization reaction of isocyanates. In this reagent system, the existence of a lowvalent niobium species was confirmed by the formation of the niobiumealkyne complex prepared from the Nb(OEt)5/Grignard reagent system and an alkyne. Furthermore, the hydrolysis and diallylation reactions of the niobiumealkyne complex provided further confirmation of its existence, with corresponding (Z)-alkene and diallylated products being isolated in good yields.
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Usanmaz
, p. 1117 (1979)
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Method for preparing aromatic isocyanate terpolymer
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Paragraph 0020; 0022; 0030-0031; 0033-0039, (2021/06/22)
The invention discloses a method for preparing an aromatic isocyanate terpolymer in the field of high polymer material synthesis, which comprises the following steps of S1, respectively taking dimethylacetamide, ethanol and sodium hydride, taking dimethylacetamide as a solvent, taking ethanol and sodium hydride as catalysts, adding into a flask, and reacting at room temperature, S2, dropwise adding aromatic isocyanate as a reaction substrate, and carrying out a heating reaction under magnetic stirring, S3, after the mixture is cooled to the room temperature, pouring the mixture into ultrapure water to separate out a product, filtering the product, washing the precipitate with water and ethanol in sequence, and drying the precipitate in a drying oven to obtain a crude product. According to the method, dimethylacetamide is used as a solvent, under the condition that ethanol is not changed, a small amount of sodium hydride is used for base catalysis of polymerization of aromatic isocyanate such as 3, 5-dimethyl phenyl isocyanate to synthesize the compound aromatic isocyanate tripolymer, the yield of the aromatic isocyanate tripolymer can be increased, the cost can be reduced, and use by people is facilitated.
Potassium complexes containing bidentate pyrrole ligands: Synthesis, structures, and catalytic activity for the cyclotrimerization of isocyanates
Guo, Zhiqiang,Xu, Yuan,Wu, Xiaoqin,Wei, Xuehong,Xi, Chanjuan
supporting information, p. 8116 - 8121 (2019/06/19)
Bidentate pyrrolyl ligands, 2-(t-butyliminomethyl)pyrrole and 2-(t-butylaminomethyl)pyrrole, reacted with KH to give complexes [C4H3N(2-CHNtBu)K(THF)]n (1) and [C4H3N(2-CH2NHsup