cas 1974-04-5, 2-Bromoheptane | Articles data

Articles about 1974-04-5Total 11 be found

Catalytic Decarboxylation/Carboxylation Platform for Accessing Isotopically Labeled Carboxylic Acids
An integrated catalytic decarboxylation/carboxylation for accessing isotopically labeled carboxylic acids with13CO2 or14CO2 is described. The method shows a wide scope under mild conditions, even in the context of late-stage functionalization, and does not require stoichiometric organometallics, thus complementing existing carbon-labeling techniques en route to carboxylic acids.
Tortajada, Andreu,Duan, Yaya,Sahoo, Basudev,Cong, Fei,Toupalas, Georgios,Sallustrau, Antoine,Loreau, Olivier,Audisio, Davide,Martin, Ruben
p. 5897 - 5901
(2019/06/17)

Highly efficient oxidative bromination of alkanes with the HBr-H 2O2 system in the presence of catalyst
Various cycloalkanes and straight-chain alkanes were efficiently brominated with an aqueous HBr-H2O2 system. This oxidative brominating process was promoted by catalysis and irradiation with light. The cycloalkanes were converted to the corresponding bromo-cycloalkanes in moderate yields and the straight-chain alkanes produced dominantly secondary bromides. This simple but effective bromination method of alkanes is characterized by high atom efficiency, inexpensive reagents and the absence of organic waste, which make it a good alternative to the existing method for Ci￡H activation through bromination. A simple, effective, environmentally friendly method was researched for bromination of alkanes in good yield with HBr as the origin of bromine.
Li, Yujin,Ju, Jie,Jia, Jianhong,Sheng, Weijian,Han, Liang,Gao, Jianrong
experimental part
p. 2428 - 2432
(2011/10/03)

Direct bromination and iodination of non-activated alkanes by hypohalite reagents
The direct functionalisation of alkanes through bromination and iodination has been successfully achieved. The combination of stoichiometric mixtures of elemental halogen and sodium alkoxides leads to the formation of alkyl hypobromites and hypoiodites as reagents. The halogenation occurs without external photostimulation under thermal reaction conditions. Georg Thieme Verlag Stuttgart.
Montoro, Raul,Wirth, Thomas
p. 1473 - 1478
(2007/10/03)

Chemoselective monobromination of alkanes promoted by unactivated MnO 2
Reaction of alkanes with bromine promoted by unactivated MnO2 gave the corresponding alkylbromides in excellent yield with good chemoselectivity. The MnO2 could be easily recovered and reused.
Jiang, Xuefeng,Shen, Meihua,Tang, Yu,Li, Chaozhong
p. 487 - 489
(2007/10/03)

Halogen-exchange reactions between alkyl fluorides and boron trihalides or tetrahalides. A convenient synthesis of alkyl halides from alkyl fluorides
A simple and effective method for converting fluoroalkanes to their corresponding chloro-, bromo- and iodo-alkanes using commercially available boron trihalides and titanium tetrahalides is described. - Keywords: Halogen-exchange reactions; Alkyl fluorides; Boron trihalides; Titanium tetrahalides; NMR spectroscopy; Mass spectrometry
Namavari, Mohammad,Satyamurthy, N.,Barrio, Jorge R.
p. 89 - 93
(2007/10/02)

Bromination of Alcohols by Boron Tribromide
Boron tribromide was used as a brominating agent for the conversion of alcohols to bromides.Tertiary alcohols were more reactive than secondary alcohols which were more reactive than primary alcohols.
Pelletier, Joelle D.,Poirier, Donald
p. 1051 - 1054
(2007/10/02)

Triphase Catalytic Conversion of Alkenes to Organic Halides
Reactions of alkenes with hydrohalogenic acids (HCl and HBr) have been studied in the presence of polystyrylmethylenehexadecylbutylphosphonium bromide (1) and polystyrylmethylenehexadecyldiphenylphosphonium bromides (2) as triphase catalysts to yield organic halides by a simple product isolation.The catalysts could be recovered and recycled without loss of activity
Khurana, Jitender M.,Tetenyi, Peter,Kodomari, Mitsuo,Regen, Steven L.
p. 1129 - 1130
(2007/10/02)

REACTIVITY OF t-BUTYLDIMETHYLSILYL ETHERS : A FACILE CONVERSION INTO BROMIDE
TBDMS ether can be efficiently converted in one step into the corresponding bromides by a CBr4, PPh3 and acetone mixture.
Mattes, Henri,Benezra, Claude
p. 1697 - 1698
(2007/10/02)

ANOMALOUS ORIENTATION EFFECTS DURING BENZOYLOXYLATIONS BY "SILVER BROMIDE DIBENZOATE"
The solid complex formed from bromine and silver benzoate reacts with both arenes and alkenes to form aryl and alkyl benzoates, respectively.Highly unusual substituent effects are observed in the benzoyloxylations of arenes.Electron-withdrawing groups (e.g. -NO2, -CN,-CO-) on the aromatic ring facilitate reaction though directing the attacking reagent exclusively to the meta position.In alkanes, tertiary positions are most prone to attack.
Bryce-Smith, Derek,Isaacs, Neil S.,Tumi, Seddeg O.
p. 1471 - 1472
(2007/10/02)

OXIDATION OF N-ALKYL-N'-TOSYLHYDRAZINES WITH BROMINE
Oxidation of N-alkyl-N'-tosylhydrazines with bromine yield alkyl bromides, vicinal alkyl dibromides and traces of alcohols.The main products of primary hydrazines are monobromides whereas secondary hydrazines preferably produce dibromides.The reaction proceeds with evolution of nitrogen and hydrobromic acid and by the formation of intermediate sulfinic ester wich may be isolated.Various substrates were examined under different conditions to confirm the validity of the reaction mechanism hypothesized.
Palmieri, Gianni
p. 4097 - 4102
(2007/10/02)

MOLECULAR MECHANISM OF HYDROGEN BROMIDE ADDITION TO OLEFINS
Experimental results on the products and the kinetics of the hydrogen bromide addition to alkenes-1 in non-polar solvents and on complex formation in hydrogen bromide-olefin-solvent systems are reviewed.Theoretical calculations concerning hydrogen bromide-olefin complexes are used along with the experimental evidence to suggest a molecular mechanism of addition involving intermediate cyclic structures.
Sergeev, G. B.,Stepanov, N. F.,Leenson, I. A.,Smirnov, V. V.,Pupyshev, V. I.,et al.
p. 2585 - 2590
(2007/10/02)