Tag: M.W:100-200

Category: tetrahydropyran. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 1-Bromo-2-pentyne, is researched, Molecular C5H7Br, CAS is 16400-32-1, about New 3-O-substituted xanthone derivatives as promising acetylcholinesterase inhibitors.

A new series of 3-O-substituted xanthone derivatives I (R = H, Bu, 2-butynyl, CH2Ph, etc.) were synthesized and evaluated for their anti-cholinergic activities against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). The results indicated that the xanthone derivatives possessed good AChE inhibitory activity with eleven of them exhibiting significant effects with the IC50 values ranging from 0.88 to 1.28μM. The AChE enzyme kinetic study of 3-(4-phenylbutoxy)-9H-xanthen-9-one and Et 2-[(9-oxo-9H-xanthen-3-yl)oxy]acetate showed a mixed inhibition mechanism. A mol. docking study showed that 3-(4-phenylbutoxy)-9H-xanthen-9-one binds to the active site of AChE and interacts via extensive π-π stacking with the indole and phenol side chains of Trp86 and Tyr337, besides the hydrogen bonding with the hydration site and π-π interaction with the phenol side chain of Y72. This study revealed that 3-O-alkoxyl substituted xanthone derivatives are potential lead structures, especially 3-(4-phenylbutoxy)-9H-xanthen-9-one and Et 2-[(9-oxo-9H-xanthen-3-yl)oxy]acetate which can be further developed into potent AChE inhibitors.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Category: tetrahydropyran. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-(2,2-dimethyl-[1,3]-dioxolan-4-yl)-methylamine, is researched, Molecular C6H13NO2, CAS is 82954-65-2, about Novel synthesis and RNA-Binding properties of aminoglycoside dimers conjugated via a naphthalene diimide-based intercalator. Author is Tok, Jeffrey B.-H.; Fenker, Jason.

The synthesis and RNA-binding properties of naphthalene-based diimide conjugated bis-aminoglycoside antibiotics are reported. Compared to the monomeric aminoglycoside, the conjugated ligands were observed to attain up to 35-fold enhancement in binding affinity towards a novel RNA construct that contained two 16S rRNA A-sites.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Thadkapally, Srinivas; Farshadfar, Kaveh; Drew, Melanie A.; Richardson, Christopher; Ariafard, Alireza; Pyne, Stephen G.; Hyland, Christopher J. T. researched the compound: 1-Bromo-2-pentyne( cas:16400-32-1 ).Application of 16400-32-1.They published the article 《Rhodium-catalysed tetradehydro-Diels-Alder reactions of enediynes via a rhodium-stabilized cyclic allene》 about this compound( cas:16400-32-1 ) in Chemical Science. Keywords: isobenzofuran preparation; isoindoline preparation; indane preparation; enediyne Diels Alder reaction rhodium catalyst. We’ll tell you more about this compound (cas:16400-32-1).

Herein, tethered unconjugated enediynes R1CCCH=CHCH(R3)XCH2CCR2 [R1 = Ph, n-pentyl, 4-fluorophenyl, etc.; R2 = H, Et, Ph; R3 = H, Me, n-Pr; X = O, NTs, NNs, C(C(O)OMe)2] have been shown to undergo a facile room-temperature RhI-catalyzed intramol. tetradehydro-Diels-Alder reaction to produce highly substituted isobenzofurans, isoindolines and indane I. Furthermore, exptl. and computational studies suggest a novel mechanism involving an unprecedented and complex RhI/RhIII/RhI/RhIII redox cycle involving the formation of an unusual strained 7-membered rhodacyclic allene intermediate and a RhIII-stabilized 6-membered ring allene complex.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-Bromo-2-pentyne(SMILESS: CCC#CCBr,cas:16400-32-1) is researched.Reference of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane. The article 《NHC/Nickel(II)-Catalyzed [3+2] Cross-Dimerization of Unactivated Olefins and Methylenecyclopropanes》 in relation to this compound, is published in Angewandte Chemie, International Edition. Let’s take a look at the latest research on this compound (cas:16400-32-1).

Cross-dimerization of a methylenecyclopropane and an unactivated alkene with typical hydroalkenylation reactivity was observed for the first time by using a [NHC-Ni(allyl)]BArF catalyst (NHC=N-heterocyclic carbene). Results show that the C-C cleavage of methylenecyclopropane did not involve a Ni0 oxidative addition, which was crucial in former systems. Thus the method reported here emerges as a complementary method for attaining highly chemo- and regioselective synthesis of methylenecyclopentanes with broad scope. An efficient NHC/NiII-catalyzed rearrangement of methylenecyclopropane leads to the convergent synthesis of methylenecyclopentanes in the presence of unactivated alkene.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 50501-07-0, is researched, SMILESS is O=C(C1NC2=C(C=CC=C2)C1)OCC, Molecular C11H13NO2Journal, Synthetic Communications called Convenient synthesis of dioxopiperazines via aminolysis of α-(pyruvylamino) esters, Author is Marshall, J. A.; Schlaf, T. F.; Csernansky, J. G., the main research direction is pyrazinoindoledione thioacetyl; thioacetylpyrazinoindoledione; pyrrolopyrazinedione; indolecarboxylate cyclization methylamine; proline ester cyclization methylamine; dioxopiperazine.COA of Formula: C11H13NO2.

Dioxopiperazines I and II were prepared from indoline III by cyclizing with MeNH2 to give dioxopiperazine IV, which was dehydrated to methylene compound V. V added AcSH to give I and II. Analogous reactions starting with pyrrole VI gave dioxopiperazine VII.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Ethyl indoline-2-carboxylate(SMILESS: O=C(C1NC2=C(C=CC=C2)C1)OCC,cas:50501-07-0) is researched.COA of Formula: C11H13NO2. The article 《Synthesis and substitution of 1,3,4,6-tetra-substituted-3,6-dihalo-2,5-piperazinediones》 in relation to this compound, is published in Bulletin of the Chemical Society of Japan. Let’s take a look at the latest research on this compound (cas:50501-07-0).

Addition of Cl to 3,6-dimethylene- (I) and 3,6-dibenzylidene-1,4-dimethyl-2,5-piperazinediones gave isomers of the corresponding tetrachloride, e.g., II, and substitution of 1,3,4,6-tetramethyl-2,5-piperazinedione with Br also gave a tetrabromide III of the same type via successive elimination and addition reactions. Treatment of III with water and with methanolic NaOAc gave the corresponding 3,6-dihydroxy and dimethoxy derivatives, resp., while treatment with NaI, Na2S, NaSCN, or NaOSCMe gave only I and S in a good yield. Similar results were obtained in the case of octahydro-5H,10H-dipyrrolo[1,2-a:1′,2′-d]pyrazine-5,10-dione. However, bromination of 6,13-dioxo-6a,7,13a,14-tetrahydro-6H,13H-pyrazino[1,2-a:4,5-a’]diindole gave rise only to aromatization. Configurations of the isomers obtained and the reaction processes were discussed.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Feng, Tian; He, Yan; Zhang, Xinying; Fan, Xuesen researched the compound: 1-Bromo-2-pentyne( cas:16400-32-1 ).Related Products of 16400-32-1.They published the article 《Synthesis of Functionalized Cyclobutane-Fused Naphthalene Derivatives via Cascade Reactions of Allenynes with tert-Butyl Nitrite》 about this compound( cas:16400-32-1 ) in Advanced Synthesis & Catalysis. Keywords: cyclobutanol nitronaphthalenol preparation; nitrocyclobutane naphthalenedione preparation; allenyne tandem. We’ll tell you more about this compound (cas:16400-32-1).

A novel synthesis of cyclobutanol-fused 2-nitronaphthalen-1-ols I [R1 = H, 6-Cl, 7-Me, 7-OCH3; R2 = Ph, 4-ClC6H4, thiophen-3-yl, etc.] and nitrocyclobutane-fused naphthalene-1,2-diones II [R3 = H, Et, C(O)OC2H5; R4 = H, Cl, F, OCH3; R5 = H, F, OCH3, Me; R6 = H; R5R6 = -CH=CH-CH=CH-] through cascade reactions of benzene-linked allenynes 2-(CCR2)-3-(R6)-4-(R5)-5-(R4)-C6HC(O)CH=C=CHR3 with tert-Bu nitrite is presented. The formation of the title compounds I and II involves a tandem process including allenyne [2+2] cycloaddition, radical addition onto the in situ formed cyclobutenyl moiety followed by radical coupling/oxidation Interestingly, different kinds of functionalized naphthalene derivatives could be obtained selectively from the same substrates, and the selectivity was easily controlled by finely tuning the reaction conditions.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Formula: C6H13NO2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: (S)-(2,2-dimethyl-[1,3]-dioxolan-4-yl)-methylamine, is researched, Molecular C6H13NO2, CAS is 82954-65-2, about Helical supramolecular organization of a 1,2-diol appended naphthalene diimide organogelator via an extended intermolecular H-bonding network. Author is Shinde, Sopan Valiba; Kulkarni, Mandar; Talukdar, Pinaki.

Self-assembly of a 1,2-diol appended naphthalene diimide derivative featuring chiral and J-type aggregation was reported. In methylcyclohexane/CHCl3, the compound exhibited intense yellow excimer and thermoreversible “”sol-gel”” behavior. Morphol. and CD studies revealed long range M-helical nanofibre formation. A theor. model of the cooperative hydrogen bonding was also proposed.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

HPLC of Formula: 98006-90-7. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2-Bromo-5-methylpyrazine, is researched, Molecular C5H5BrN2, CAS is 98006-90-7, about Synthesis and Characterization of 2-(2-Pyridinyl)pyrazine and 2,2′-Bipyrazine Derivatives. Author is KomReddy, Venugopal; Rillema, D. Paul; Nguyen, Huy; Kadel, Lava.

A convenient and high yield preparation of 2-(2-pyridinyl)pyrazine and derivatives of 2,2′-bipyrazine compounds from their derivatives of bromopyrazine using Stille coupling was reported. X-ray structures, elemental anal., 1H, 13C-NMR, and mass spectral data of the compounds were given.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Computed Properties of C6H13NO2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (S)-(2,2-dimethyl-[1,3]-dioxolan-4-yl)-methylamine, is researched, Molecular C6H13NO2, CAS is 82954-65-2, about Synthesis of glycidol- and sugar-derived bicyclic β- and γ/δ-amino acids for peptidomimetic design. Author is Danieli, Elisa; Trabocchi, Andrea; Menchi, Gloria; Guarna, Antonio.

Constrained bicyclic β- and γ/δ-amino acids I (R = H or CH2OBn; Fmoc = fluorenylmethoxycarbonyl, Bn = benzyl) and II were developed using glycidol and sugar derivatives The synthetic strategies involved epoxide ring opening of a glycidol derivative, and subsequent coupling with sugar-derived amines, leading to di- or trisubstituted bicyclic scaffolds after cyclization with trifluoroacetic acid. Achievement of β- or γ/δ-amino acids was accomplished by changing the protecting group strategy of the starting materials. Compatibility of the scaffold with solid-phase peptide synthesis was assessed by preparing model peptidomimetics using acid- and base-labile resins, thus giving a new tool for peptidomimetic design.

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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics