27026-93-3Relevant articles and documents
Cooperation of the Neutral and the Cationic Leaving Group Pathways in Acid-Catalyzed O-Benzylation of TriBOT
Fujita, Hikaru,Hayakawa, Naoko,Kunishima, Munetaka
, p. 10684 - 10687 (2018/07/25)
The reaction profile of acid-catalyzed O-benzylation with 2,4,6-tris(benzyloxy)-1,3,5-triazine (TriBOT) was analyzed to study the reaction kinetics. The first-order kinetic constant for the formation of benzyl cation species from N-protonated TriBOT (neutral leaving group pathway) was estimated and compared with that of the model compound for TriBOT. Since rapid consumption of TriBOT in the late stage could not be explained solely by this pathway, cooperation of another reaction mechanism, the cationic leaving group pathway, was proposed to rationalize the rate acceleration.
Using bar infrared spectra and coincidence indexes to study the diversity of solid cyanuric acid structures
Nilo, Marcela C. B. G.,Sim?es, Thais G.,Neto, Claudio Costa
, p. 1499 - 1515 (2018/06/12)
A general method was developed for studying the diversity of individuals in a population based on the diversity of infrared spectra of solid cyanuric acid analytes obtained from various reactions of trichlorocyanuric acid. This method first generates infrared bar spectra for the analytes and then measures the coincidence and continence among pairs of the spectral peaks via confrontation matrices. Class markers are established to characterize analyte classes. Possible correlations among the employed reaction conditions and the nature of the produced solids, which are based on their infrared bar spectra, are discussed. The method of coincidence may be useful for characterizing polymorphs, particularly those of active pharmaceutical ingredients (APIs). The method may also be extended to define the homogeneity of solid analytes. The ANALIN module of the ANALOR software suite running on a dBase platform is used to generate the bar infrared spectra and to handle all calculations.
Phosphorus-Doped Carbon Nitride Tubes with a Layered Micro-nanostructure for Enhanced Visible-Light Photocatalytic Hydrogen Evolution
Guo, Shien,Deng, Zhaopeng,Li, Mingxia,Jiang, Baojiang,Tian, Chungui,Pan, Qingjiang,Fu, Honggang
supporting information, p. 1830 - 1834 (2016/02/03)
Phosphorus-doped hexagonal tubular carbon nitride (P-TCN) with the layered stacking structure was obtained from a hexagonal rod-like single crystal supramolecular precursor (monoclinic, C2/m). The production process of P-TCN involves two steps: 1) the precursor was prepared by self-assembly of melamine with cyanuric acid from in situ hydrolysis of melamine under phosphorous acid-assisted hydrothermal conditions; 2) the pyrolysis was initiated at the center of precursor under heating, thus giving the hexagonal P-TCN. The tubular structure favors the enhancement of light scattering and active sites. Meanwhile, the introduction of phosphorus leads to a narrow band gap and increased electric conductivity. Thus, the P-TCN exhibited a high hydrogen evolution rate of 67 μmol h-1 (0.1 g catalyst, λ >420 nm) in the presence of sacrificial agents, and an apparent quantum efficiency of 5.68 % at 420 nm, which is better than most of bulk g-C3N4 reported. Phosphorus-doped hexagonal carbon nitride tubes were obtained from a rod-like supramolecular precursor through phosphorous acid assisted hydrothermal and subsequent thermal treatment. It exhibits a high visible-light photocatalytic hydrogen evolution performance that is better than most reported bulk carbon nitrides, which is due to the hierarchical micro-nanostructure and P doping.
Expedient and efficient one pot synthesis of trifluoroethyl ethers from metal free 2,4,6-tris-(2,2,2-trifluoro-ethoxy)-[1,3,5] triazene
Mangawa, Shrawan Kumar,Sharma, Chiranjeev,Singh, Ashawani Kumar,Awasthi, Satish K.
, p. 35042 - 35045 (2015/05/04)
An efficient synthesis of fluorinated alkyl and aryl ethers was achieved by the use of s-triazene derived fluorinated reagent 2,4,6-tris-(2,2,2-trifluoro-ethoxy)-[1,3,5] triazene (TriTFET). The procedure offers a very attractive alternative for the synthesis of fluorinated motifs that are found in various bioactive molecules. Moreover, TriTFET is a synthetic non-toxic, non-ozone depleting and stable reagent. All compounds were characterized by 1H, 13C and 19F NMR.
Trinitromethylation reactions of chloro-1,3,5-triazines
Gidaspov,Bakharev,Kukushkin
experimental part, p. 2154 - 2163 (2011/01/07)
Reactions of chloro-1,3,5-triazines with trinitromethane salts were studied. Depending on conditions, trinitromethane salts used and special additives, six types of 2,4,6-trichloro-1,3,5-triazine trinitromethylation reactions were revealed, namely, bis-trinitromethylation-nitro-nyloxylation, bis-trinitromethylation-amination, bis-trinitromethylation-hydroxylation, trinitromethylation-dialkoxylation, trinitromethylation-diaryloxylation, and trinitromethylation-alkoxylation-aryloxylation. The mechanisms of reactions are proposed.
PROCESS FOR THE PREPARATION OF RETINOL AND INTERMEDIATES THEREFOR
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, (2008/06/13)
The reaction of a halogenated sulfone derivative of general formula (1): wherein Ar is optionally substituted aryl and X is halogen, with a base can attain easy production of retinol useful in the fields of drugs, feed derivatives and food derivatives. The intermediate in this production can easily be obtained by reaction of a diol compound of general formula (2): wherein Ar is as defined above, which can be derived from relatively inexpensive starting materials, with a Group IV transition metal halide without protecting the primary hydroxyl group.
Process for producing retinal and intermediate for producing the same
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, (2008/06/13)
There are disclosed sulfone aldehyde derivatives of the Formula (1): wherein Ar is an optionally substituted aryl group, a process for producing retinal by using the same, and an intermediate for producing the sulfone aldehyde derivative.
Tetraene derivative and process for producing the same
-
, (2008/06/13)
A tetraene derivative of the formula (1): wherein Ar represents an aryl group which may be optionally substituted with at least one substituent, and R1 and R2 are identical or different and represent a hydrogen atom, a lower alkyl group or a protective group of a hydroxyl group; synthesis methods therefor and synthesis methods using the same.
Method for halogenating an aromatic compound
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, (2008/06/13)
A method for halogenating an aromatic compound, which comprises reacting the aromatic compound of the formula (I): STR1 wherein X is a hydroxyl group, an amino group or an acylamino group, each of Z1 and Z2 is a hydrogen atom or a halogen atom, one of R and Y is a hydrogen atom and the other is a nitro group, a cyano group or a trifluoromethyl group, and Q is a nitrogen atom or --C(T)= (wherein T is a hydrogen atom, a halogen atom, a nitro group, a cyano group or a trifluoromethyl group), with a halogenating agent to obtain a 3-halogenoaromatic compound of the formula (II): STR2 wherein one of R' and Y' is a halogen atom and the other is a nitro group, a cyano group or a trifluoromethyl group, and X, Z1, Z2 and Q are as defined above.
Products of Reactions of Azido Derivatives of s-Triazine with Some O- and N-Nucleophiles
Azev, Yu. A.,Gusel'nikova, O. L.,Klyuev, N. A.,Shorshnev, S. V.,Rusinov, V. L.,Chupakhin, O. N.
, p. 1418 - 1424 (2007/10/03)
The mobility of the azido group in alkoxy derivatives of s-triazine in reactions with some O- and N-nucleophiles has been studied.Reactions of azidoalkoxy-s-triazines with ammonia gave products of substitution of both the azido and alkoxy groups.In reactions of azido-s-triazines with hydrazines, replacement of the azido group is accompanied by transformation of the triazine ring to give triazolylaminotetrazoles.Acid hydrolysis of diazidoalkoxy derivatives yields cyanuric acid as a result of substitution of both the azido and alkoxy groups.When diazidoalkoxy-s-triazines are heated in water in the absence of an acid, transformations of the triazine ring occurs with formation of bis(5-tetrazolyl)amine.
