Category: 4721-98-6

Chemistry is traditionally divided into organic and inorganic chemistry. Formula: C12H15NO2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 4721-98-6

Butyltriphenylphosphonium tetraborate (BTPPTB) as a selective reducing agent for the reduction of imines, enamines and oximes and reductive alkylation of aldehydes or ketones with primary amines in methanol or under solid-phase conditions

Butyltriphenylphosphonium tetraborate (BTPPTB) 1, generated as white solid from butyltriphenylphosphonium bromide and sodium borohydride, is found to be a selective and versatile reducing agent. The reagent in methanol or under solvent-free conditions is very useful for the reduction of imines, enamines and oximes or reductive amination of aldehydes and ketones. Under solvent-free conditions the reactions are faster and the yields of the products are higher.

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Reference：
Isoquinoline – Wikipedia,
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Synthesis of a water-soluble cationic chiral diamine ligand bearing a diguanidinium and application in asymmetric transfer hydrogenation

A novel water-soluble cationic N-monosulfonated chiral diamine ligand diguanidinium 1c was easily prepared from (R,R)-DPEN and its rhodium complex and was successfully applied in the asymmetric transfer hydrogenation of prochiral ketones and imines in water by using sodium formate and formic acid as co-hydrogen donors. Various substrates were reduced with high yields and good to excellent enantioselectivities (up to >99% ee).

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Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Application In Synthesis of 6,7-Dimethoxy-1-methyl-3,4-dihydroisoquinoline. Introducing a new discovery about 4721-98-6, Name is 6,7-Dimethoxy-1-methyl-3,4-dihydroisoquinoline

Studies with enamines and azaenamines: Synthesis and reactivity of 3-dimethylamino-2-[(3-indolyl) carbonyl]propenonitrile

(Chemical Equation Presented) 2-Oxo-3-(indol-3-yl)propanonitrile 2 condensed with dimethylformamide dimethylacetal to yield the enaminonitrile 3. The latter reacted with 4-chloroaniline to yield the 4- chlorophenylaminoacrylonitrile 5. Reaction of 3 with hydrazine hydrate led to formation of pyrazole-4-carbonitrile 6. Compound 3 reacted with ethyl acetoacetate in refluxing acetic acid and in presence of ammonium acetate to yield the indolylpyridine 10. Enamine 3 reacted with 5(1H)-aminotriazole 13 and 3(5)-aminopyrazole 17 to yield the pyrimidine derivatives 15 and 19, respectively.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Application In Synthesis of 6,7-Dimethoxy-1-methyl-3,4-dihydroisoquinoline, you can also check out more blogs about4721-98-6

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Method for neutralizing detrimental effects of thiolbearing compounds on metal catalysts

The present invention relates to the use of a thiol-neutralising agent for maintaining the catalytic activity of a metal catalyst in a cellular environment, wherein said cellular environment is characterized by the presence of a compound bearing a thiol group prior to addition of said thiol-neutralising agent.

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Base-Mediated Cascade Cyclization: Stereoselective Synthesis of Benzooxazocinone

A new strategy for the synthesis of the oxa-azabicyclo[3.3.1]nonane subunit, a component of the naucleamide E core structure, has been developed. This annulation reaction between 1-substituted 3,4-dihydroisoquinolines and coumarin derivatives conveniently affords the oxa-azabicyclo[3.3.1]nonane framework via a base-mediated cascade cyclization under aqueous conditions. The value of this work lies in the efficient formation of the oxa-azabicyclo[3.3.1]nonane skeleton via a process whereby all the C-C, C-O, and C-N bond formations occur in a single chemical operation. In addition, the subsequent ring opening of these compounds furnished pyridoisoquinoline derivatives.

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The first Bischler-Napieralski cyclization in a room temperature ionic liquid

We have demonstrated the use of the room temperature ionic liquid, 1-butyl-3-methylimidazoliumhexafluorophosphate ([bmim]PF6), as an environmentally benign solvent for the preparation of isoquinoline derivatives through Bischler-Napieralski cyclization under mild conditions with excellent purity and yields. The role of HF as a catalyst in the reaction was also investigated.

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Reference：
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

 

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Transfer hydrogenation process

A catalytic transfer hydrogenation process is provided. The catalyst employed in the process is a metal neutral hydrocarbyl complex which is coordinated to defined bidentate ligands. Preferred metals include rhodium, ruthenium and iridium. Preferred bidentate ligands are diamines and aminoalcohols, particularly those comprising chiral centers. The hydrogen donor is advantageously a mixture of triethylamine and formic acid. The process can be employed to transfer hydrogenate iminium salts, which are preferably prochiral.

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A very mild access to 3,4-dihydroisoquinolines using triphenyl phosphite-bromine-mediated bischler-napieralski-type cyclization

Substituted beta-phenylethylamides undergo smooth intramolecular cyclization to 3,4-dihydroisoquinolines in good to excellent yields when treated with bromotriphenoxyphosphonium bromide at -60C in dichloromethane in the presence of triethylamine. The reaction proceeds under the mildest conditions ever reported for Bischler-Napieralski-type cyclizations. When chlorotriphenoxyphosphonium choride is used, low yields are obtained instead. Georg Thieme Verlag Stuttgart.

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Isoquinoline – Wikipedia,
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In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 4721-98-6, name is 6,7-Dimethoxy-1-methyl-3,4-dihydroisoquinoline, introducing its new discovery. COA of Formula: C12H15NO2

Cerium Chloride Catalyzed, 2-Iodoxybenzoic Acid Mediated Oxidative Dehydrogenation of Multiple Heterocycles at Room Temperature

Catalytic cerium chloride was found to activate 2-iodoxybenzoic acid (IBX) for the oxidative dehydrogenation of tetrahydroisoquinolines, tetrahydro-beta-carbolines, and thiazolidines to their dehydrogenated and aromatic forms at room temperature in moderate to excellent yields. The robustness of the protocol was demonstrated by scaling up the reactions to multigram quantities.

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Ru(II) complexes of N-Alkylated TsDPEN ligands in asymmetric transfer hydrogenation of ketones and imines

N-Alkylated TsDPEN derivatives bearing a small alkyl group act as highly efficient ligands in Ru(II) complexes for the asymmetric transfer hydrogenation of imines and ketones. A larger alkyl group serves to significantly reduce the activity of the catalyst; however, high enantiomeric excesses are still obtained. An X-ray crystal structure of the N-benzyl derivative reveals a conformation that permits hydrogen transfer through a six-membered transition state. A transition state structure for the imine reduction process is proposed.

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Isoquinoline – Wikipedia,
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