Category: tetrahydroisoquinoline

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The invention discloses a succinic acid thorley that new raw materials of synthesizing process, respectively in order to 2 – phenethylamine and 3 – synthesizing hydrochloride as the starting material synthetic fragment A, fragment B, the occurrence of the condensation reaction produced Solley that new, by succinic acid and get thorley that new, characterized in that using straight chain paraffins and water is used as the reaction solvent, alkali metal hydroxide or carbonate, hydrogencarbonate for capture, phenethylamine takes acylation reaction with benzoyl chloride is not soluble in the reaction solvent of solid precipitation fragment A intermediate 1, after treatment directly during the filtering; fragment A isomer, using dimethyl sulfoxide as solvent, alkali metal hydroxide catalytic racemic, the by-product isomer can be recycled; fragment of B 2nd step treatment after the reaction, the conventional vacuum distillation method to obtain a high purity, high yield of 3 – acetoxy quinine acetic acid salt, the invention provides a high yield, is suitable for industrial mass production, economic and environmental protection new synthesis process. (by machine translation)

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Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Aromatic interactions can greatly affect the stability and interactions of a crystal. They are the strongest such interactions after hydrogen bonding. In a patent, 3340-78-1, name is 2-Phenyl-1,2,3,4-tetrahydroisoquinoline, introducing its new discovery. Recommanded Product: 3340-78-1

Cross-dehydrogenative-coupling reaction has long been recognized as a powerful tool to form a C-C bond directly from two different C-H bonds. Most current processes are performed by making use of stoichiometric amounts of oxidizing agents. We describe here a new type of reaction, namely cross-coupling hydrogen evolution (CCHE), with no use of any sacrificial oxidants, and only hydrogen (H2) is generated as a side product. By combining eosin Y and a graphene-supported RuO2 nanocomposite (G-RuO2) as a photosensitizer and a catalyst, the desired cross-coupling products and H 2 are achieved in quantitative yields under visible light irradiation at room temperature.

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Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

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A novel method for the synthesis of alpha-aminonitrile through visible-light-induced oxidative cyanation of N-aryltetrahydroisoquinoline with potassium thiocyanate has been developed. The process does not require the use of a photocatalyst, transition metal reagent, strong oxidizing agent, or toxic cyano-containing compound, which makes the reaction simple and green.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

In chemical reaction engineering, 78183-55-8, simulations are useful for investigating and optimizing a particular reaction process or system. 78183-55-8, Name is (S)-Methyl 1,2,3,4-tetrahydroisoquinoline-3-carboxylate hydrochloride, molecular formula is C11H14ClNO2. In a Article，once mentioned of 78183-55-8

We report herein the synthesis of new dioxopiperazine isoquinolines using the Pictet-Spengler cyclisation. Our synthetic strategy for the preparation of two new compounds (5, 6), with a tetrahydro-6H-pyrazino[1,2-b]isoquinoline-1,4-dione moiety was developed in only four steps. To understand better the crucial step of the synthesis reported here, theoretical calculations using semiempirical (PM3), ab initio and DFT computations were carried out on a reduced system model. The structure of chlorohydrate water solvate of tetrahydro (2-piperidinylethyl)-6H-pyrazino [1,2-b]isoquinoline-1,4-dione (6·HCl·2H2O) was determined by X-ray diffraction. Theoretical calculations (RHF/3-21G and RB3LYP/6-31G(d)) were also performed for compound 6 neutralised with a chloride ion.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

As the most studied and widely used chiral ligands, 226942-29-6 have been rapidly developed in recent decades due to their simple synthesis, easy modification, and the ability to achieve excellent results in multiple reactions. Application of 226942-29-6, 226942-29-6, Name is 6-Bromo-1,2,3,4-tetrahydroisoquinoline, molecular formula is C9H10BrN. In a Patent，once mentioned of 226942-29-6

The invention provides compounds of formula (I): wherein R1, R 2, A, A1 and B are as defined in the specification; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy. The compounds are useful as MMP inhibitors.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

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An efficient visible-light-induced alpha-oxidation of N-substituted tetrahydroisoquinolines to dihydroisoquinolones has been developed using eosin Y as an organo-photocatalyst and oxygen as a green oxidant. The reactions were carried out under mild reaction conditions; the desired dihydroisoquinolones were obtained in up to 96% yield at room temperature under oxygen atmosphere. This transformation provides a convenient route to dihydroisoquinolones with a wide range of substrates. (Figure presented.).

The π-electrons of these planar compounds are free to cycle around the circular arrangements of atoms found in the aromatic moieties. This stems from the resonance found in planar ring systems, like benzene, and 3340-78-1

Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

Research speed reading in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. An article , which mentions Reference of 3340-78-1, molecular formula is C15H15N. The compound – 2-Phenyl-1,2,3,4-tetrahydroisoquinoline played an important role in people’s production and life., Reference of 3340-78-1

The direct formation of new C-C bonds through photocatalytic oxidative coupling from low reactive sp3 C-H bonds using environmentally benign and cheap oxygen as oxidant is an important area in sustainable chemistry. By incorporating the photoredox catalyst [SiW11O39Ru(H2O)]5- into the pores of Cu-based metal-organic frameworks, a new approach for merging Cu-catalysis/Ru-photocatalysis within one single MOF was achieved. The direct CuII-O-W(Ru) bridges made the two metal catalyses being synergetic, enabling the application on the catalysis of the oxidative coupling C-C bond formation from acetophenones and N-phenyl-tetrahydroisoquinoline with excellent conversion and size-selectivity. The method takes advantage of visible light photoredox catalysis to generate iminium ion intermediate from N-phenyl-tetrahydroisoquinoline under mild conditions and the easy combination with Cu-catalyzed activation of nucleophiles. Control catalytic experiments using similar Cu-based sheets but with the photoredox catalytic anions embedded was also investigated for comparison.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

The Raman spectra of 29 alkenyl methyl ethers, CnH(2n-1)OCH3, of diverse structure containing up to seven carbon atoms are reported and discussed. All these spectra contain a strong band in the region 1640-1680 cm-1 associated with the stretching vibration of the C=C double bond. Reliable correlations are found between the wavenumber of this band and the position, stereochemistry and substitution pattern of the double bond the band is at higher wavenumber for ethers containing a di- or tri-substituted bond than for those with a monosubstituted bond and at higher wavenumber for trans than cis-stereoisomers. One or more bands in the range 2995-3080 cm-1 associated with the stretching vibration(s) of the sp2C-H bond(s) are also evident in the spectra of most of the ethers, but these bands are sometimes obscured by the stronger bands corresponding to stretching vibrations of the sp3C-H bonds at slightly lower wavenumber (generally below ca. 2950 cm-1). Correlations involving the number and position(s) of these band provide confirmatory evidence on the substitution pattern and stereochemistry of the C=C group. Unequivocal assignment of the symmetric and asymmetric C-H stretching vibrations of the important terminal C=CH2 entity is possible on the basis of these studies; these conclusions are supported by analysis of the Raman spectrum of the deuterium labelled ether CD2=CH(CH2)3OCH3.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

A stable and isolable bis[(tetrabutylammonium) di-mu-iodo-diiododicuprate(i)] complex has been identified for the direct oxidative synthesis of alpha-ketoamides from substituted aryl methyl ketones and secondary amines in the presence of molecular oxygen. Gratifyingly, this Cu(i) complex acts as an effective catalytic system with enhanced solubility in both water and organic solvents. These reactions were effectively accelerated by microwave irradiation in water and were applied for the synthesis of a variety of substituted alpha-ketoamides with good yields. It was interesting to note that, in these optimized microwave reaction times, alpha-ketoamides were the exclusive products and amide byproducts observed in previous reports were not formed.

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Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem

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The use of the tetrahydroisoquinoline scaffold is well documented in biologically active compounds. However, reports of the utilisation of tetrahydroisoquinoline compounds in asymmetric catalysis are limited. The synthesis of novel diamine ligands possessing the tetrahydroisoquinoline (tetrahydroisoquinoline) backbone and evaluation of their activity in the asymmetric transfer hydrogenation of acetophenone are presented. The diamine ligands in conjunction with i-PrOH as the hydrogen source and [RhCl2(Cp*)]2 as the metal precursor proved to be the most effective of the tetrahydroisoquinoline derivatives for this catalytic system. Water was found to have a profound influence on the enantioselectivity of the reaction. Optimisation of the amount water, i-PrOH and catalytic loading content rendered the best result of 70% enantioselectivity for the (S)-1-phenylethanol isomer product.

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Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem