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1199357-22-6

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1199357-22-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1199357-22-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,9,3,5 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1199357-22:
(9*1)+(8*1)+(7*9)+(6*9)+(5*3)+(4*5)+(3*7)+(2*2)+(1*2)=196
196 % 10 = 6
So 1199357-22-6 is a valid CAS Registry Number.

1199357-22-6Relevant articles and documents

Iridium-catalysed hydrosilylation of cyclopropanes: Via regioselective carbon-carbon bond cleavage

Murai, Masahito,Nishiyama, Atsushi,Nishinaka, Naoki,Morita, Haruka,Takai, Kazuhiko

, p. 9281 - 9284 (2017)

While cyclopropanes have been explored as synthetically valuable building blocks, their transformation without conjugated substituents or directly substituted heteroatoms remains challenging. The current study describes the iridium-catalysed ring-opening hydrosilylation of cyclopropanes. A nitrogen-based directing group was found to control the reactivity of iridium active species as well as the regiochemistry of carbon-carbon bond cleavage and hydrosilylation.

Reactions of 1,2,4-Oxadiazole[4,5-a]piridinium Salts with Alcohols: the Synthesis of Alkoxybutadienyl 1,2,4-Oxadiazoles

Moiola, Mattia,Leusciatti, Marco,Quadrelli, Paolo

, p. 195 - 199 (2020)

1,2,4-Oxadiazole[4,5-a]piridinium salts add alcohols and alkoxides to undergo electrocyclic ring opening affording alkoxybutadienyl 1,2,4-oxadiazole derivatives. The pyridinium salts represent a special class of Zincke salts that are prone to rearrange to give alkoxybutadienyl 1,2,4-oxadiazoles when treated with suitable nucleophiles or, alternatively, to give pyridones in the presence of bicarbonate. The pivotal tuning of the experimental conditions leads to a straightforward synthesis of valuable 1,2,4-oxadiazole derivatives. The mechanism is also discussed in the light of previous observations.

Photoinduced heterolysis of the carbon-oxygen bond in bichromophoric 1- arylmethyloxy-2-pyridones

Sakurai, Tadamitsu,Kubo, Kanji,Kojima, Shunsuke,Shoro, Takuya,Inoue, Hiroyasu

, p. 9747 - 9750 (1998)

Irradiation of the title compound having a 9-anthryl (1a) or a 1- pyrenyl group (1b) in methanol was found to give the heterolytic C-O bond cleavage products: 1-hydroxy-2-pyridone and arylmethyl methyl ether, (which predominate for the reaction of 1a), along with 2-pyridone, aryl-substituted methanol and aryl aldehyde derived from the homolysis of the N-O bond (that mainly occurs in the photolysis of 1b). Spectroscopic analysis of the ground- state and excited singlet-state behavior of 1 revealed that a non-emissive intramolecular exciplex (whose formation rate is much faster in 1a than in 1b) plays a key role in inducing the C-O bond heterolysis.

Kinetics and products of the TiO2 photocatalytic degradation of pyridine in water

Maillard-Dupuy,Guillard,Courbon,Pichat

, p. 2176 - 2183 (1994)

Pyridine (Pyr), a noxious chemical whose ring is part of the chemical structure of many pesticides, is more rapidly eliminated in water by photocatalysis over TiO2 than benzamide, whose nucleus has also a relatively low electron density and whose extent of adsorption is equivalent. Hydroxylation of Pyr first occurs only at position 2. Beside acetate and formate, whose formation from Pyr is derived from ion chromatography analysis, seven aliphatic intermediates with one to five C atoms are identified by GC-MS. They all contain one or several C=O groups, and wherever the N atom subsists, it is as an amide, i.e., with an unchanged oxidation number. For relatively high initial Pyr concentrations (16.5 mmol/L), dipyridyl and carbamoyl pyridine isomers are also detected as intermediates, at much lower concentrations, however, than that of 2-hydroxypyridine; this shows the existence of coupling reactions. Within an UV irradiation period about 2.5 times as long as that necessary to eliminate Pyr, organic nitrogen is almost entirely mineralized, mainly into NH4+ ions that are very slowly oxidized to nitrate.

EQUILIBRE LACTIME-LACTAME DES HYDROXY-PYRIDINES ET DES HYDROXY-PYRIMIDINES (URACILES) EN MILIEU APOLAIRE: ETUDE INFRA-ROUGE

Chevrier, Marianne,Bensaude, Olivier,Guillerez, Jean,Dubois, Jacques-Emile

, p. 3359 - 3362 (1980)

In contrast to what observed with mono hydroxy-pyridines and -pyrimidines the lactim-lactam equilibrium of uracils is not found to be markedly influenced by solvent polarity.

The spontaneous hydrolysis of 2-pyridyl phosphate is a good model for the special mechanism for the hydrolysis of phosphate monoester monoanions

Medeiros, Michelle,Manfredi, Alex M.,Kirby, Anthony J.,Nome, Faruk

, p. 1044 - 1047 (2013)

The microscopic pKa of the pyridine N of the phosphate monoester 2-pyridyl phosphate (MPP) is 2.76, significantly higher than that expected for the leaving group (RO) oxygen of a typical monoester ROPO3 =. This favours the prototropic equilibrium considered to be the key step in the rapid hydrolysis of a typical monoester, and the observed rate of hydrolysis of the monoanion MPP- is shown to be close to that expected for the protomer MPP+=, with neutral 2-pyridone as the leaving group. Copyright 2013 John Wiley & Sons, Ltd. The prototropic equilibrium is a key step in the hydrolysis of monoester MPP-, allowing neutral 2-pyridone to be the leaving group from MPP+=. Copyright

Synthesis and rearrangement of quinone-embedded epoxycyclopentenones: A new avenue to pyranonaphthoquinones and indenopyranones

De Saroj,Ghorai, Sujit K.,Mal, Dipakranjan

, p. 1598 - 1604 (2009)

The epoxyquinones (e.g., 24), readily assembled in one step from the quinols (e.g., 27) by a simplified version of the Dowd oxidation, are shown to undergo rearrangement to pyranonaphthoquinones (e.g., 28) and their ring contracted homologues (e.g., 29) on flash vacuum pyrolysis at 450 °C and 0.01 Torr. The rearrangement has been demonstrated to be useful for a regiospecific synthesis of lambertellin (3). Similarly, the masked aziridinocyclopentanone 9 rearranges to 2-pyridone (37).

Tosvinyl and besvinyl as protecting groups of imides, azinones, nucleosides, sultams, and lactams. Catalytic conjugate additions to tosylacetylene

Petit, Elena,Bosch, Llus,Font, Joan,Mola, Laura,Costa, Anna M.,Vilarrasa, Jaume

, p. 8826 - 8834 (2015/01/08)

The use of the 2-(4-methylphenylsulfonyl)-ethenyl (tosvinyl, Tsv) group for the protection of the NH group of a series of imides, azinones (including AZT), inosines, and cyclic sulfonamides has been examined. The Tsvprotected derivatives are obtained in excellent yields by conjugate addition to tosylacetylene (ethynyl p-tolyl sulfone). The stereochemistry of the double bond can be controlled at will: with only 1 mol % of Et3N or with catalytic amounts of NaH, the Z stereoisomers are generated almost exclusively, while the E isomers are obtained using a stoichiometric amount of DMAP. Analogous phenylsulfonylvinyl-protected groups (with the besvinyl or Bsv group instead of Tsv) are obtained stereospecifically by reaction with (Z)- or (E)-bis(phenylsulfonyl)ethene. For lactams and oxazolidinones, this last method is much better. The Tsv and Bsv groups are stable in the presence of non-nucleophilic bases and to acids. They can be removed highly effectively via a conjugate addition-elimination mechanism using pyrrolidine or sodium dodecanethiolate as nucleophiles.

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