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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Synergistic Catalysis by Br?nsted Acid/Carbodicarbene Mimicking Frustrated Lewis Pair-Like Reactivity
Bai, Yuna,Chan, Yi-Chen,Chen, Hsing-Yin,Chen, Hsuan-Ying,Chen, Wen-Ching,Li, Chen-Yu,Ong, Tiow-Gan,Tseng, Mei-Chun,Wu, Ying-Yann,Yap, Glenn P. A.,Zhao, Lili
supporting information, p. 19949 - 19956 (2021/08/03)
Carbodicarbene (CDC), unique carbenic entities bearing two lone pairs of electrons are well-known for their strong Lewis basicity. We demonstrate herein, upon introducing a weak Br?nsted acid benzyl alcohol (BnOH) as a co-modulator, CDC is remolded into a Frustrated Lewis Pair (FLP)-like reactivity. DFT calculation and experimental evidence show BnOH loosely interacting with the binding pocket of CDC via H-bonding and π-π stacking. Four distinct reactions in nature were deployed to demonstrate the viability of proof-of-concept as synergistic FLP/Modulator (CDC/BnOH), demonstrating enhanced catalytic reactivity in cyclotrimerization of isocyanate, polymerization process for L-lactide (LA), methyl methacrylate (MMA) and dehydrosilylation of alcohols. Importantly, the catalytic reactivity of carbodicarbene is uniquely distinct from conventional NHC which relies on only single chemical feature of nucleophilicity. This finding also provides a new spin in diversifying FLP reactivity with co-modulator or co-catalyst.
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
