Month: October 2022

Viana, Hugo; Carreiro, Elisabete P.; Goth, Albertino; Bacalhau, Patricia; Caldeira, Ana Teresa; Martins, Maria do Rosario; Burke, Anthony Joseph published the artcile< Sequential alcohol oxidation/putative homo Claisen-Tishchenko-type reaction to give esters: a key process in accessing novel biologically active lactone macrocycles>, SDS of cas: 135999-16-5, the main research area is diether ester preparation acetylcholinesterase butyrylcholinesterase inhibitor; aryloxyethyl alc tandem PCC oxidation Claisen Tishchenko esterification; lactone macrocycle preparation; borylated diether ester regioselective preparation Suzuki Miyaura coupling.

Application of a sequential pyridinium chlorochromate (PCC) alc. oxidation/putative Cr-catalyzed Claisen-Tishchenko reaction of primary alcs. to provide diether-esters, e.g., I was reported. The reaction could be conducted with 1 equiv of PCC and 1 equiv of BF3·OEt2. Indications based on literature precedent were that the reaction might proceed via a sequential alc. oxidation to the aldehyde followed by a putative Cr or boron catalyzed Claisen-Tishchenko-type reaction. Using this efficient methodol., a family of novel diether-esters was synthesized in very good yields; some of these mols. were subsequently tested against both acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). In addition, a new synthetic strategy for the synthesis of lactone macrocycles with potential biol. activity was also disclosed. This methodol. included the regioselective borylation of the ester substrate and a subsequent Suzuki-Miyaura coupling to obtain the desired lactone macrocycle.

RSC Advances published new progress about Borylation. 135999-16-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H7BrO2, SDS of cas: 135999-16-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gan, Zengyu; Huang, Jianping; Chen, Jinyin; Nisar, Muhammad Farrukh; Qi, Wenwen published the artcile< Synthesis and antifungal activities of cinnamaldehyde derivatives against Penicillium digitatum causing citrus green mold>, Application In Synthesis of 3893-18-3, the main research area is Cinnamaldehyde Penicillium antifungal activity citrus.

Penicillium digitatum (green mold) is pathogenic fungi and causes citrus fruit postharvest rotting that leads to huge economic losses across the world. The current study was aimed to develop a new derivative of cinnamaldehyde (4-methoxycinnamaldehyde) through the cross-hydroxyaldehyde condensation method with benzaldehyde substituted by a benzene ring under the catalysis of alk. reagent and, moreover, to test their antifungal potential against P. digitatum, the major citrus fruit rotting fungi. Multiple derivatives of cinnamaldehyde viz. 4-nitro CA, 4-chloro CA, 4-bromo CA, 4-Me CA, 4-methoxy CA, and 2,4-dimethoxy CA were synthesized in the current study whereas the 4-methoxy CA showed highest antifungal actions for citrus fruit postharvest rotting fungi P. digitatum. Moreover, 4-methoxy CA was found to reduce the spore germination and growth by damaging the fungal cell membrane, as well as declined the levels of reducing sugars.

Journal of Food Quality published new progress about Bases Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (reagent). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Application In Synthesis of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Belov, Dmitry S.; Mathivathanan, Logesh; Beazley, Melanie J.; Martin, William Blake; Bukhryakov, Konstantin V. published the artcile< Stereospecific Ring-Opening Metathesis Polymerization of Norbornene Catalyzed by Iron Complexes>, Synthetic Route of 576-83-0, the main research area is stereospecific ring opening metathesis polymerization norbornene catalyzed iron; iron; metathesis; norbornene; ring-opening polymerization; syndiotactic.

Developing well-defined iron-based catalysts for olefin metathesis would be a breakthrough achievement in the field not only to replace existing catalysts by inexpensive metals but also to attain a new reactivity taking advantage of the unique electronic structure of the base metals. Here, we present a two-coordinate homoleptic iron complex, Fe(HMTO)2 [HMTO=O-2,6-(2,4,6-Me3C6H2)2C6H3], that is capable of performing ring-opening metathesis polymerization of norbornene to produce highly stereoregular polynorbornene (99% cis, syndiotactic). The use of heteroleptic Fe(HMTO)(RO) [RO=(CH3)2CF3CO, CH3(CF3)2CO, or Ph(CF3)2CO] prepared in situ significantly increases the polymerization rate while preserving selectivity. The resulting polymers were characterized by 1H and 13C NMR spectroscopy and gel-permeation chromatog.

Angewandte Chemie, International Edition published new progress about Electronic structure. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Synthetic Route of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Dietrich, Justin D.; Longenecker, Kenton L.; Wilson, Noel S.; Goess, Christian; Panchal, Sanjay C.; Swann, Steven L.; Petros, Andrew M.; Hobson, Adrian D.; Ihle, David; Song, Danying; Richardson, Paul; Comess, Kenneth M.; Cox, Philip B.; Dombrowski, Amanda; Sarris, Kathy; Donnelly-Roberts, Diana L.; Duignan, David B.; Gomtsyan, Arthur; Jung, Paul; Krueger, A. Chris; Mathieu, Suzanne; McClure, Andrea; Stoll, Vincent S.; Wetter, Jill; Mankovich, John A.; Hajduk, Philip J.; Vasudevan, Anil; Stoffel, Robert H.; Sun, Chaohong published the artcile< Development of Orally Efficacious Allosteric Inhibitors of TNFα via Fragment-Based Drug Design>, Recommanded Product: 2-Amino-4-bromobenzoic acid, the main research area is antiinflammation TNF alpha FBDD allosteric desymmetrization drug like isoquinoline.

Tumor necrosis factor α (TNFα) is a soluble cytokine that is directly involved in systemic inflammation through the regulation of the intracellular NF-κB and MAPK signaling pathways. The development of biol. drugs that inhibit TNFα has led to improved clin. outcomes for patients with rheumatoid arthritis and other chronic autoimmune diseases; however, TNFα has proven to be difficult to drug with small mols. Herein, we present a two-phase, fragment-based drug discovery (FBDD) effort in which we first identified isoquinoline fragments that disrupt TNFα ligand-receptor binding through an allosteric desymmetrization mechanism as observed in high-resolution crystal structures. The second phase of discovery focused on the de novo design and optimization of fragments with improved binding efficiency and drug-like properties. The 3-indolinone-based lead compound 12 (I) presented here displays oral, in vivo efficacy in a mouse glucose-6-phosphate isomerase (GPI)-induced paw swelling model comparable to that seen with a TNFα antibody.

Journal of Medicinal Chemistry published new progress about Allosteric modulators. 20776-50-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H6BrNO2, Recommanded Product: 2-Amino-4-bromobenzoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Feng; Ma, Jun; Tan, Ya; Yu, Gang; Qin, Hongxin; Zheng, Lirong; Liu, Hongbo; Li, Run published the artcile< Construction of Porphyrin Porous Organic Cage as a Support for Single Cobalt Atoms for Photocatalytic Oxidation in Visible Light>, Synthetic Route of 3959-07-7, the main research area is construction porphyrin porous organic cage support single cobalt atom; oxidative coupling reaction catalyst benzylamine.

The construction of an appropriate support for a single atom catalyst plays an important role in delivering a high catalytic performance. However, most reported host materials suffer the drawbacks of low photostability and limited visible light absorption. Herein, we report a porous organic cage as a high-quality support for single metal atoms by a facile stepwise nucleophilic substitution approach. Thanks to its intrinsic advantages of extended visible light absorption, suppressed charge recombination, and improved electron transfer, the obtained single Co atoms anchored organic cage (CoP@POC) demonstrates a prominent photocatalytic efficiency for oxidation of amines into imines in visible light. An excellent reaction conversion and selectivity up to 99%, associated with a turnover frequency (TOF) of 1389 h-1 and 22 989 mmol g-1 h-1 are achieved based on organic cage and single Co atoms, resp., which outperforms most reported photocatalysts. Moreover, a negligible conversion decrease in 5 repeating cycles and no photobleaching after the reaction was detected, implying a remarkable photostability of CoP@POC.

ACS Catalysis published new progress about Aralkyl amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Synthetic Route of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Xiaoyun; Yang, Yuan; Liang, Yun published the artcile< Palladium-catalyzed double N-arylation to synthesize multisubstituted dibenzoazepine derivatives>, Application of C8H4BrNO, the main research area is double arylation primary amine bisbromophenylethene palladium catalyst; dibenzoazepine preparation.

Palladium-catalyzed double N-arylation of primary amines with (Z)-1,2-bis(2-bromophenyl)ethenes was investigated. E.g., in presence of Pd2(dba)3 and DPEphos, double N-arylation of 4-FC6H4NH2 with (Z)-1,2-bis(2-bromophenyl)ethene gave 81% dibenzoazepine derivative (I). A variety of dibenzoazepine derivatives were synthesized in good to excellent yields.

Tetrahedron Letters published new progress about Arylation. 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, Application of C8H4BrNO.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Orita, Ryoji; Franckevicius, Marius; Vysniauskas, Aurimas; Gulbinas, Vidmantas; Sugiyama, Haruki; Uekusa, Hidehiro; Kanosue, Kenta; Ishige, Ryohei; Ando, Shinji published the artcile< Enhanced fluorescence of phthalimide compounds induced by the incorporation of electron-donating alicyclic amino groups>, Category: bromides-buliding-blocks, the main research area is phthalimide derivative preparation crystal structure fluorescene property.

Due to their high thermal and environmental stability, polyimides (PIs) are one of the most attractive candidates for novel highly fluorescent polymers, though photophys. studies of PIs are challenging owing to their poor solubility in common solvents. To overcome these problems, we have synthesized and examined a series of low mol. weight model imide compounds: substituted N-cyclohexylphthalimides with alicyclic amino groups at the 3 or 4-positions of the benzene rings (x-NHPIs). Their photophys. properties were systematically investigated by steady-state UV/Visible absorption, fluorescence, and time-resolved fluorescence techniques. In solution, unsubstituted N-cyclohexylphthalimide (NHPI) showed almost no emission, while x-NHPIs exhibited enhanced fluorescence emission depending on the solvent polarity. Anal. of the solvatochromism of the x-NHPIs via Lippert-Mataga plots indicated the generation of large dipole moments in the excited singlet states originating from the intramol. charge-transfer (ICT) states. The significant difference in the fluorescence quantum yields (Φ) between the 3-substituted (3Pi and 3Pyr) and 4-substituted NHPIs (4Pi and 4Pyr) strongly suggests that the former form a twisted ICT (TICT) state, whereas the latter form a planar ICT (PICT) state when excited. 4-Substituted NHPIs also show high fluorescence yields in the crystalline state. A particularly large Φ value was obtained for the 4Pi crystal, which we explain by the large intermol. distances and the arrangement of mols. minimizing intermol. interactions as well as the small non-radiative deactivation rate. These facts clearly demonstrate that the introduction of an alicyclic amino group into NHPI at the 4-position enhances the fluorescence quantum yields significantly, which suggests a new pathway for the development of novel, highly fluorescent PIs.

Physical Chemistry Chemical Physics published new progress about Bond angle, dihedral. 82-73-5 belongs to class bromides-buliding-blocks, and the molecular formula is C8H3BrO3, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xie, Linhuang; Zheng, Zhiye; Lin, Qiuyuan; Zhou, Huan; Ji, Xiaofan; Sessler, Jonathan L.; Wang, Hongyu published the artcile< Calix[4]pyrrole-based Crosslinked Polymer Networks for Highly Effective Iodine Adsorption from Water>, Computed Properties of 184239-35-8, the main research area is calixpyrrole crosslinked polymer iodine adsorption water; adsorption; calix[4]pyrrole; iodine; porous organic polymers.

A series of calix[4]pyrrole-based crosslinked polymer networks designed for iodine capture is reported. These materials were prepared by Sonogashira coupling of α,α,α,α-tetra(4-alkynylphenyl)calix[4]pyrrole with bishalide building blocks with different electronic properties and mol. sizes. Despite their low Brunauer-Emmett-Teller surface areas, iodine vapor adsorption capacities of up to 3.38 g g-1 were seen, a finding ascribed to the presence of a large number of effective sorption sites including macrocyclic π-rich cavities, aryl units, and alkyne groups within the material. One particular system, C[4]P-BTP, was highly effective at iodine capture from water (uptake capacity of 3.24 g g-1 from a concentrated aqueous KI/I2 solution at ambient temperature). Fast capture kinetics (kobs=7.814 g g-1 min-1) were seen. Flow-through adsorption experiments revealed that C[4]P-BTP is able to remove 93.2% of iodine from an aqueous source phase at a flow rate of 1 mL min-1.

Angewandte Chemie, International Edition published new progress about Adsorbents. 184239-35-8 belongs to class bromides-buliding-blocks, and the molecular formula is C26H18Br2, Computed Properties of 184239-35-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Guo, Le; Mao, Junjie; Guo, Shuangxi; Zhang, Qi; Cai, Shuangfei; He, Wei published the artcile< PtAu bimetallic nanocatalyst for selective hydrogenation of alkenes over aryl halides>, Application of C8H9Br, the main research area is platinum gold nanocatalyst hydrogenation chemoselectivity enantioselectivity.

Herein, we present a new strategy that for the first time achieved chemo- and enantio-selective hydrogenation of alkenes over arylhalides. Key to the success is that instead of using external poisons, we use the composition of the bimetallic nanocrystal catalysts to control chemoselectivity (hydrogenation of C=C bonds without cleavage of Ar-X bonds). We further show that this system combined with surface modifying chiral ligands can control the enantioselectivity. Thus, after synthesizing and screening a series of easily accessible MxAuy (M = Pd, Pt; x, y = 1, 3, 5) bimetallic nanocrystals (9-10 nm) supported on activated carbon, we identified that Pt1Au1/C is a recyclable and generally applicable catalyst for the chemoselective hydrogenation of alkenes without cleaving aryl halogen bonds. Furthermore, cinchonidine modified Pt1Au1/C is shown to be capable of enantioselective hydrogenation, as illustrated by the rapid and enantio-enriched synthesis of RIP1 inhibitor analog 7-Br-O-Nec1.

Nano Research published new progress about Binding energy. 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Application of C8H9Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Liu, Xiaolin; Liang, Xin; Hu, Yubing; Han, Lei; Qu, Qing; Liu, Dongming; Guo, Jing; Zeng, Zebing; Bai, Haotian; Kwok, Ryan T. K.; Qin, Anjun; Lam, Jacky W. Y.; Tang, Ben Zhong published the artcile< Catalyst-Free Spontaneous Polymerization with 100% Atom Economy: Facile Synthesis of Photoresponsive Polysulfonates with Multifunctionalities>, Recommanded Product: 1,2-Bis(4-bromophenyl)-1,2-diphenylethene, the main research area is multifunctional polysulfonate catalyst free spontaneous polymerization.

Photoresponsive polymers have attracted extensive attention due to their tunable functionalities and advanced applications; thus, it is significant to develop facile in situ synthesis strategies, extend polymers family, and establish various applications for photoresponsive polymers. Herein, we develop a catalyst-free spontaneous polymerization of dihaloalkynes and disulfonic acids without photosensitive monomers for the in situ synthesis of photoresponsive polysulfonates at room temperature in air with 100% atom economy in high yields. The resulting polysulfonates could undergo visible photodegradation with strong photoacid generation, leading to various applications including dual-emissive or 3D photopatterning, and practical broad-spectrum antibacterial activity. The halogen-rich polysulfonates also exhibit a high and photoswitched refractive index and could undergo efficient postfunctionalizations to further expand the variety and functionality of photoresponsive heteroatom-containing polyesters.

JACS Au published new progress about Abbe number. 184239-35-8 belongs to class bromides-buliding-blocks, and the molecular formula is C26H18Br2, Recommanded Product: 1,2-Bis(4-bromophenyl)-1,2-diphenylethene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary