Category: Dioxole

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: H-Trp-OMe.HCl( cas:7524-52-9 ) is researched.Reference of H-Trp-OMe.HCl.Singh, Prabhpreet; Sharma, Poonam published the article 《Nano cuboids: Impact of 8-hydroxyquinoline on tryptophan properties and its applications》 about this compound( cas:7524-52-9 ) in Tetrahedron Letters. Keywords: hydroxyquinoline tryptophan conjugate fluorescent nanocuboid aluminum water latent fingerprint. Let’s learn more about this compound (cas:7524-52-9).

N-terminal tryptophan residues can be labeled with fluorophore by chem. reaction. Here in we report conjugation of 8-hydroxyquinoline (as fluorophore) with tryptophan using Schiff-base condensation reaction to decipher the impact of 8-hydroxyquinoline on the fluorescence and self-assembly properties of tryptophan in water. This water-soluble hydroxyquinoline-tryptophan (HQ-W1) conjugate has been demonstrated to have Aggregation Induced Emission (AIE) phenomena in water. HQ-W1 undergo spontaneous self-assembly to form nano cuboidal superstructures having 200-500 nm diameter and 300-650 nm length. In metal-ion binding studies this HQ-W1 shows selective fluorescence enhancement (14.5-fold) in the presence of Al3+ ions. The detection limit is 3.0 nM (UV method) and 3.53 nM (FI method). The AIE utility of HQ-W1 has been demonstrated by developing latent fingerprints.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: H-Trp-OMe.HCl( cas:7524-52-9 ) is researched.Quality Control of H-Trp-OMe.HCl.Vallakati, Ravikrishna; Plotnikov, Abel T.; Altman, Ryan A. published the article 《Synthesis of 2-D-L-tryptophan by sequential Ir-catalyzed reactions》 about this compound( cas:7524-52-9 ) in Tetrahedron. Keywords: deuterated tryptophan synthesis stability; tryptophan borylation deuteration iridium catalyst deprotection scrambling reaction; C–H Borylation; Deborylative deuteration; Deuterium labeling; L-Tryptophan; Metal-Catalysis. Let’s learn more about this compound (cas:7524-52-9).

Herein, we report a practical synthesis of 2-D-L-tryptophan via sequential Ir-catalyzed C-H borylation, and Ir-catalyzed C-2-deborylative deuteration steps. In this synthetic sequence, deprotection of the Boc (Boc = tert-butoxycarbonyl) and Me ester groups proved challenging, due to replacement of deuterium with hydrogen. However, mild deprotection conditions were developed to avoid this D/H scrambling. Further, 2-D-L-tryptophan is stable in many buffers used for biol. studies.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Quality Control of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide. 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: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Synthesis and in vitro evaluation of 2,3-dibromo-3-methyl-1-phenylphospholane 1-oxide for potential anti-proliferative effects.

A novel phospha sugar analog, 2,3-dibromo-3-methyl-1-phenylphosphotane 1-oxide (DBMPP), was prepared from 1-phenyl-3-methyl-2-phospholene1-oxide and evaluated by in vitro MTT method for leukemia cells and microscopic observations for solid tumor cells, e.g., stomach cancer cells. The evaluation revealed clearly that the synthesized phospha sugar analog DBMPP has competent potentials and excellent anti-cancer activities that killed selectively and specifically the leukemia cells of cell lines of K562 and U937 but did not give any damages on healthy leukocyte. Moreover, it was revealed that DBMPP killed solid cancer cells such as stomach cancer cells and melanoma of cell lines of MKN45 and G361. Therefore, DBMPP should exert anti-proliferative effects for different kinds of tumor cells based on the in vitro evaluations. The cell cycle analyses by flow cytometry for K562 and U937 cells clearly demonstrated that the mechanism of the anti-proliferative effect on the human tumor cells is apoptosis induced by DBMPP.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Application of 7524-52-9. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: H-Trp-OMe.HCl, is researched, Molecular C12H15ClN2O2, CAS is 7524-52-9, about Cu(II)-Catalysed Azide-Alkyne Cycloaddition Reaction towards Synthesis of β-Carboline C1-Tethered 1,2,3-Triazole Derivatives. Author is Kumar, Sunit; Malakar, Chandi C.; Singh, Virender.

The synthesis of hybrid mols. containingβ-carboline C1-linked 1,2,3-triazoles I (R1 = H, COOMe, COOEt; R2 = H, Me, Bn, CH2COOEt, etc.; R3 = Ph, n-Bu, COOEt, n-pentyl, CH2OH; R4 = H, COOEt) in moderate to good yields has been described. The developed transformation was realized by using Cu(II)-catalyzed click-reaction of diverse alkynes R3CC R4 with in-situ derived rarely explored β-carboline tethered aliphatic azides II. These mol. hybrids also exhibited excellent fluorescence properties.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Zeng, Guangkuo; Li, Yunqiang; Qiao, Baokun; Zhao, Xiaowei; Jiang, Zhiyong published the article 《Photoredox asymmetric catalytic enantioconvergent substitution of 3-chlorooxindoles》. Keywords: aminomethylene oxindole preparation enantioselective; chlorooxindole aryl glycine substitution photocatalyst.They researched the compound: 2-Bromomethyl-1,3-dioxolane( cas:4360-63-8 ).HPLC of Formula: 4360-63-8. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:4360-63-8) here.

An enantioconvergent substitution of 3-substituted 3-chlorooxindoles I (R = H, 6-Cl, 4-Br, 5-NO2, etc.; R1 = 4-FC6H4S(O)2, Me; Ar = Ph, naphthalen-2-yl, C6D5, etc.) with N-aryl glycines Ar1NHCH2C(O)OH [Ar1 = 4-methoxyphenyl, 4-methoxy-3-(trifluoromethyl)phenyl] under visible light irradiation is reported. A transition-metal-free cooperative catalysis platform with a dicyanopyrazine-derived chromophore (DPZ) as a photoredox catalyst and a chiral Bronsted acid catalyst is effective for these transformations, which involve a single-electron transfer redox step and an enantioselective radical coupling. A variety of valuable chiral 3-aminomethylene-3-substituted oxindoles II can be directly synthesized with high yields and enantioselectivities.

In addition to the literature in the link below, there is a lot of literature about this compound(2-Bromomethyl-1,3-dioxolane)HPLC of Formula: 4360-63-8, illustrating the importance and wide applicability of this compound(4360-63-8).

Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 1265884-98-7, is researched, Molecular C34H22NO2P, about Cu-Catalyzed asymmetric borylative cyclization of cyclohexadienone-containing 1,6-enynes, the main research direction is copper chiral phosphine asym cyclization enyne catalyst preparation tetrahydrobenzofuranone; tetrahydrobenzofuranone boronate chiral preparation asym cyclization enyne copper catalyst.Computed Properties of C34H22NO2P.

The first CuCl/phosphine-catalyzed asym. borylative cyclization of cyclohexadienone-containing 1,6-enynes I (1a-r) is achieved through a tandem process: selective β-borylation of propargylic ether and subsequent conjugate addition to cyclohexadienone, giving bicyclic enones II [3a-r, R1 = H, Me, Et, Bu; R2 = Me, Et, PhCH2, 4-BrC6H4, TBSOCH2CH2, iPr, CH2:CH, MeOCOCH2, Br(CH2)3, CH2:CHCH2, Ph, AcO(CH2)2, MeO; R3 = H, Me; R4 = H, Me] with moderate to high yields and generally, with >90% ee. The reaction proceeds with excellent regioselectivity and enantioselectivity to afford an optically pure cis-hydrobenzofuran framework bearing alkenylboronate and enone substructures. Furthermore, the resulting bicyclic products could be converted to bridged and tricyclic ring structures. This method extends the realm of Cu-catalyzed asym. tandem reactions using bis(pinacolato)diboron (B2pin2).

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Synthetic Route of C4H7BrO2. 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: 2-Bromomethyl-1,3-dioxolane, is researched, Molecular C4H7BrO2, CAS is 4360-63-8, about A Practical and Versatile Method for the C-H Sulfenylation of Imidazo[1,2- a ]pyridines. Author is Al-Saedy, Muhannad A. E.; Harrity, Joseph P. A..

Direct introduction of a broad selection of aromatic, heteroaromatic, or alkyl fragments connected by a thioether group into these important heterocycles by using readily prepared thiosulfate salts was reported.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

HPLC of Formula: 707-61-9. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Synthesis of photosensitive polycarbodiimide. Author is Mochizuki, Amane; Takeshi, Kazumasa; Haba, Osamu; Kato, Sadao; Ueda, Mitsuru.

A neg.-working photosensitive polymer based on polycarbodiimide (PCD) and {[(4,5-dimethoxy-2-nitrobenzyl)oxy]carbonyl}-2-methylpiperidine (I) as a photoamine generator(PAG) has been developed. The end-capped PCDs with number average mol. weights of 1500 and 2500 were prepared by polycondensation of tolylene 2,4-diisocyanate (TDI) in the presence of m-tolyl isocyanate and 3-methyl-1-phenyl-2-phospholene-1-oxide as an end-capping agent and a catalyst, resp. PCDs were amorphous and soluble in common organic solvents, such as toluene, chloroform, and cyclohexanone. Thermogravimetry of the polymers showed good thermal stability, indicating that a 10% weight loss of the polymers was at 480° in nitrogen. The PCD films were transparent above 360 nm. The PCD containing I showed a sensitivity of 225 mJ/cm2 and a contrast of 1.5, when it was post-baked at 90°C sec, followed by development with toluene at 25°C.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Safety of 2-Bromomethyl-1,3-dioxolane. 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-Bromomethyl-1,3-dioxolane, is researched, Molecular C4H7BrO2, CAS is 4360-63-8, about Discovery of novel positive allosteric modulators of the α7 nicotinic acetylcholine receptor: Scaffold hopping approach. Author is Ledneczki, Istvan; Tapolcsanyi, Pal; Gabor, Eszter; Visegrady, Andras; Vass, Marton; Eles, Janos; Holm, Patrik; Horvath, Anita; Pocsai, Aniko; Maho, Sandor; Greiner, Istvan; Kramos, Balazs; Beni, Zoltan; Koti, Janos; Kancz, Anna E.; Than, Marta; Kolok, Sandor; Laszy, Judit; Balazs, Ottilia; Bugovits, Gyula; Nagy, Jozsef; Vastag, Monika; Szajli, Agota; Bozo, Eva; Levay, Gyorgy; Lendvai, Balazs; Nemethy, Zsolt.

The paper focuses on the scaffold hopping-based discovery and characterization of novel nicotinic alpha 7 receptor pos. modulator (α7 nAChR PAM) ligands around the reference mol. (A-867744). First, substantial efforts were carried out to assess the importance of the various pharmacophoric elements on the in vitro potency (SAR evaluation) by chem. modifications. Subsequently, several new derivatives with versatile, heteroaromatic central cores were synthesized and characterized. A promising, pyrazole-containing new chemotype with good physicochem. and in vitro parameters was identified. Retrospective anal. based on homol. modeling was also carried out. Besides its favorable in vitro characteristics, the most advanced derivative 69 also showed in vivo efficacy in a rodent model of cognition (scopolamine-induced amnesia in the mouse place recognition test) and acceptable pharmacokinetic properties. Based on the in vivo data, the resulting mol. with advanced drug-like characteristics has the possibility to improve cognitive performance in a biol. relevant dose range, further strengthening the view of the supportive role of α7 nACh receptors in the cognitive processes.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Chartier, Magali; Desgagne, Michael; Sousbie, Marc; Rumsby, Charles; Chevillard, Lucie; Theroux, Lea; Haroune, Lounes; Cote, Jerome; Longpre, Jean-Michel; Boudreault, Pierre-Luc; Marsault, Eric; Sarret, Philippe published the article 《Pharmacodynamic and pharmacokinetic profiles of a neurotensin receptor type 2 (NTS2) analgesic macrocyclic analog》. Keywords: neurotensin receptor cyclic peptide pharmacodynamic pharmacokinetic profile analgesic; Analgesia; Macrocycle; Metabolic stability; Opioid-sparing effects; Pain.They researched the compound: H-Trp-OMe.HCl( cas:7524-52-9 ).Quality Control of H-Trp-OMe.HCl. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:7524-52-9) here.

The current opioid crisis highlights the urgent need to develop safe and effective pain medications. Thus, neurotensin (NT) compounds represent a promising approach, as the antinociceptive effects of NT are mediated by activation of the two G protein-coupled receptor subtypes (i.e., NTS1 and NTS2) and produce potent opioid-independent analgesia. Here, we describe the synthesis and pharmacodynamic and pharmacokinetic properties of the first constrained NTS2 macrocyclic NT(8-13) analog. The Tyr11 residue of NT(8-13) was replaced with a Trp residue to achieve NTS2 selectivity, and a rationally designed side-chain to side-chain macrocyclization reaction was applied between Lys8 and Trp11 to constrain the peptide in an active binding conformation and limit its recognition by proteolytic enzymes. The resulting macrocyclic peptide, CR-01-64, exhibited high-affinity for NTS2 (Ki 7.0 nM), with a more than 125-fold selectivity over NTS1, as well as an improved plasma stability profile (t1/2 > 24 h) compared with NT (t1/2 ∼ 2 min). Following intrathecal administration, CR-01-64 exerted dose-dependent and long-lasting analgesic effects in acute (ED50 = 4.6 μg/kg) and tonic (ED50 = 7.1 μg/kg) pain models as well as strong mech. anti-allodynic effects in the CFA-induced chronic inflammatory pain model. Of particular importance, this constrained NTS2 analog exerted potent nonopioid antinociceptive effects and potentiated opioid-induced analgesia when combined with morphine. At high doses, CR-01-64 did not cause hypothermia or ileum relaxation, although it did induce mild and short-term hypotension, all of which are physiol. effects associated with NTS1 activation. Overall, these results demonstrate the strong therapeutic potential of NTS2-selective analogs for the management of pain.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem