1785-02-0Relevant articles and documents
The catalytic effects of in situ prepared N-heterocyclic carbenes from benzimidazole salts in Suzuki–Miyaura cross-coupling reaction and uses in catalytic preparation of 1,3,5-triphenyl-1,3,5-triazinane-2,4,6-trione from phenyl isocyanate
Yilmaz, ülkü,Kü?ükbay, Hasan
, p. 1706 - 1719 (2018)
Many benzimidazole salts bearing a 3-phenylpropyl substituent (1a–1h) were synthesized and their structures were identified by1 H NMR,13 C NMR, and IR spectroscopic methods and elemental analysis. These N-heterocyclic carbene (NHC) precursors were used as a part of a catalytic system including Pd(OAc) 2 and the base in the Suzuki–Miyaura cross-coupling reaction under microwave irradiation. They were also used as catalysts in the cyclotrimerization of phenyl isocyanate to yield 1,3,5-triphenyl-1,3,5-triazinane-2,4,6-trione. It has been observed that benzimidazole salts made a positive contribution to both catalytic reactions as a NHC precursor.
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
Guanidinate stabilized germanium(II) and tin(II) amide complexes and their catalytic activity for aryl isocyanate cyclization
Barman, Milan Kr,Baishya, Ashim,Peddarao, Thota,Nembenna, Sharanappa
, p. 265 - 270 (2014)
Two different synthetic routes for the preparation of guanidinate stabilized germanium(II) and tin(II) amide complexes have been established. First, the reaction of one equiv of bulky guanidine ligand either L1H or L2H [L1
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
Orthorhombic and monoclinic polymorphs of 1,3,5-triphenylperhydro-1,3,5-triazine-2,4,6-trione at 120 K: Chains and sheets formed by c - h...π(arene) hydrogen bonds
Mariyatra, M. Baby,Panchanatheswaran, Krishnaswamy,Low, John N.,Glidewell, Christopher
, p. o682-o685 (2004)
The orthorhombic and monoclinic polymorphs of 1,3,5-triphenylperhydro-1,3,5-triazine-2,4,6-trione, were analyzed at 120 K with chains and sheets formed by C-H...π(arene) hydrogen bonds. The orthorhombic polymorph crystallized in space group Fdd2, molecule
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.
Preparation, Characterization, and X-Ray Structure Studies of Tertiary Phosphine Coordinated Molybdenocene
Ito, Takashi,Tokunaga, Tadayuki,Minato, Makoto,Nakamura, Takashi
, p. 1893 - 1896 (1991)
Cp2MoH(OTs) (Cp = η-C5H5, Ts = p-CH3C6H4SO2), which was prepared from Cp2MoH2 by its treatment with TsOH in EtOH, reacted with tertiary phosphines and phosphite to give cationic +TsOH- where R = Ph, Et, OEt, Cy, and Bus
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.
