Author: Jessica.F

Mattarella, Martin published the artcileNanomolar cholera toxin inhibitors based on symmetrical pentavalent ganglioside GM1os-sym-corannulenes, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Organic & Biomolecular Chemistry (2013), 11(26), 4333-4339, database is CAplus and MEDLINE.

Eight sym. and pentavalent corannulene derivatives were functionalized with galactose and the ganglioside GM1-oligosaccharide (GM1os) via copper-catalyzed alkyne-azide cycloaddition (CuAAC) reactions. The compounds were evaluated for their ability to inhibit the binding of the pentavalent cholera toxin to its natural ligand, ganglioside GM1. In this assay, all ganglioside GM1os-sym-corannulenes proved to be highly potent nanomolar inhibitors of cholera toxin.

Organic & Biomolecular Chemistry published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wang, Zhiming published the artcileHighly π-extended polymers based on phenanthro-pyrazine: Synthesis, characterization, theoretical calculation and photovoltaic properties, Formula: C4Br2N2O4S, the publication is Polymer (2013), 54(22), 6191-6199, database is CAplus.

Two novel narrow bandgap conjugated polymers containing phenanthro-pyrazine unit have been successfully synthesized by the Stille coupling reaction. Comparing to the common polymers containing dithiophen-quinoxaline or dithiophen-thieno[3,4-b]pyrazine moiety, the conjugation degree of these new polymers is extended through the direction perpendicular to the main chain by introducing phenanthrene-9,10-dione to maintain a rigid conjugated bridge. The obtained polymers exhibit solution-processing ability, high thermal stabilities, broad visible absorption bands and narrow optical bandgaps. Theor. studies disclose that the P2 exhibits wholly coplanar conformation in 1-D and 2-D direction, and the PCE value is 6-folded higher than P1 under the same photovoltaic measurement condition.

Polymer published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C13H26N2, Formula: C4Br2N2O4S.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wang, Wei published the artcileBuilding fluorescent sensors by template polymerization: the preparation of a fluorescent sensor for D-fructose, Application In Synthesis of 166821-88-1, the publication is Organic Letters (1999), 1(8), 1209-1212, database is CAplus and MEDLINE.

The application of mol. imprinting in making fluorescent sensors was hampered by the lack of suitable fluorescent tags, which would respond to the binding event with significant fluorescence intensity changes. The authors have designed and synthesized a fluorescent monomer which allows for the preparation of fluorescent sensors of cis diols using mol. imprinting methods. This monomer was used for the preparation of sensitive fluorescent sensors for D-fructose.

Organic Letters published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C7H8BFO2, Application In Synthesis of 166821-88-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Hu, Qinglian published the artcileMitochondria-Targeted Cancer Therapy Using a Light-Up Probe with Aggregation-Induced-Emission Characteristics, Safety of 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, the publication is Angewandte Chemie, International Edition (2014), 53(51), 14225-14229, database is CAplus and MEDLINE.

Subcellular organelle-specific reagents for simultaneous tumor targeting, imaging, and treatment are of enormous interest in cancer therapy. Herein, the authors present a mitochondria-targeting probe (AIE-mito-TPP) by conjugating a triphenylphosphine (TPP) with a fluorogen which can undergo aggregation-induced emission (AIE). Owing to the more neg. mitochondrial membrane potential of cancer cells than normal cells, the AIE-mito-TPP probe can selectively accumulate in cancer-cell mitochondria and light up its fluorescence. More importantly, the probe exhibits selective cytotoxicity for studied cancer cells over normal cells. The high potency of AIE-mito-TPP correlates with its strong ability to aggregate in mitochondria, which can efficiently decrease the mitochondria membrane potential and increase the level of intracellular reactive oxygen species (ROS) in cancer cells. The mitochondrial light-up probe provides a unique strategy for potential image-guided therapy of cancer cells.

Angewandte Chemie, International Edition published new progress about 1207448-58-5. 1207448-58-5 belongs to bromides-buliding-blocks, auxiliary class Bromide,Benzene,Phenol,Ether,Aldehyde, name is 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, and the molecular formula is C13H17BrO3, Safety of 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Li, Yang published the artcileOrganic NIR-II dyes with ultralong circulation persistence for image-guided delivery and therapy, Formula: C4Br2N2O4S, the publication is Journal of Controlled Release (2022), 157-169, database is CAplus and MEDLINE.

Nanocarriers hold great promise for the controlled release of therapeutic payloads to target organs/tissues and extended duration of anticancer agents in the bloodstream. However, limited data on their in vivo pharmacokinetics and delivery process hamper clin. applications. Here we report a series of micellar nanocarriers self-assembled from new-generation thiophenthiadiazole (TTD)-based NIR-II fluorophores HLAnP (n = 1-4) for simultaneous bioimaging and drug delivery. The NIR-II HLA4P nanocarrier displays exceptional non-fouling performance, minimal immunogenicity, ultralong blood half-life, and high tumor accumulation even with different administration routes. When used as a drug carrier, HLA4P with encapsulated doxorubicin (DOX) realized accurate tumor targeting and continuous real-time in vivo NIR-II tracking of drug delivery and therapy, showing a sustained release rate, improved therapeutic effect, and diminished cardiotoxicity as compared to free DOX. This study provides a new perspective on the design of dual-functional NIR-II fluorophores for diagnostic and therapeutic applications.

Journal of Controlled Release published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Formula: C4Br2N2O4S.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wilson, Claire M. published the artcileEnantiospecific sp²-sp³ Coupling of ortho- and para-Phenols with Secondary and Tertiary Boronic Esters, COA of Formula: C7H8BBrO3, the publication is Angewandte Chemie, International Edition (2017), 56(51), 16318-16322, database is CAplus and MEDLINE.

The coupling of ortho- and para-phenols with secondary and tertiary boronic esters has been explored. In the case of para-substituted phenols, after reaction of a dilithio phenolate species with a boronic ester, treatment with Ph₃BiF₂ or Martin’s sulfurane gave the coupled product with complete enantiospecificity. The methodol. was applied to the synthesis of the broad spectrum antibacterial natural product (-)-4-(1,5-dimethylhex-4-enyl)-2-methylphenol. For ortho-substituted phenols, initial incorporation of a benzotriazole on the phenol oxygen atom was required. Subsequent ortho-lithiation and borylation gave the coupled product, again with complete stereospecificity.

Angewandte Chemie, International Edition published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C19H14N2, COA of Formula: C7H8BBrO3.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Kulkarni, Bheemashankar A. published the artcileA solid-phase equivalent of van Leusen’s TosMIC, and its application in oxazole synthesis, Quality Control of 243455-57-4, the publication is Tetrahedron Letters (1999), 40(30), 5633-5636, database is CAplus.

Polystyrene-SH resin, prepared from Merrifield resin in two steps, was converted to polystyrene-SO₂-CH₂-NC in three steps. This resin functions as a solid-phase equivalent of p-tolylsulfonylmethyl isocyanide (TosMIC). Thus, reaction with aromatic aldehydes and tetrabutylammonium hydroxide as base yields 5-aryloxazoles.

Tetrahedron Letters published new progress about 243455-57-4. 243455-57-4 belongs to bromides-buliding-blocks, auxiliary class Oxazole,Bromide,Benzene, name is 5-(3-Bromophenyl)oxazole, and the molecular formula is C9H6BrNO, Quality Control of 243455-57-4.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Preston, Adam J. published the artcileSynthesis and Selected Reactions of a Bicyclic Sultam Having Sulfur at the Apex Position, Safety of Sodium 3-bromopropane-1-sulfonate, the publication is Journal of Organic Chemistry (2006), 71(17), 6573-6578, database is CAplus and MEDLINE.

A practical synthesis of the bicyclic dienyl sultam I has been developed. The viable route involved several key steps. Of these, ring-closing metathesis, represented by the conversion of II to III, had to be implemented in advance of the assembly of other rings such as is present in IV. The second double bond was best introduced by a bromination-dehydrobromination sequence, the 2-fold loss of HBr being achieved most reliably by the use of tetra-n-butylammonium fluoride in CH₂Cl₂ or DMSO. The direct irradiation of I gave rise to the endo-oriented cyclobutene derivative V. The title diene is not a ready participant in Diels-Alder reactions. When heated with endo-bornyltriazolinedione in Et acetate solution, conversion to a 1:1 mixture of VI and its diastereomer occurred as confirmed by X-ray crystallog. anal. From the mechanistic perspective, this transformation constitutes an interesting example of a stereocontrolled and regioselective [2+2] cycloaddition followed by a vinylcyclobutane-cyclohexene rearrangement. Products V and VI constitute examples of strained sulfonamides featuring a norbornyl-like structural component.

Journal of Organic Chemistry published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C3H6BrNaO3S, Safety of Sodium 3-bromopropane-1-sulfonate.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Leitner, Christian published the artcileTotal synthesis of (±)-20S-hydroxy-1,2-dehydro-pseudoaspidospermidine via a C-H activation/transannular cyclization strategy, Quality Control of 69361-41-7, the publication is Chemical Communications (Cambridge, United Kingdom) (2017), 53(54), 7451-7453, database is CAplus and MEDLINE.

A total synthesis toward the pseudoaspidospermidine family via a C-H activation/transannular cyclization strategy has been accomplished. The applicability of this approach is showcased in the concise synthesis (ten steps) of (±)-20S-hydroxy-1,2-dehydro-pseudoaspidospermidine (I) starting from known dihydropyridone II. Via a joint synthetic sequence, we were also able to address the related iboga alkaloid (±)-isovelbanamine (III) in nine steps. Key features of this synthesis are a transannular cyclization to generate the pseudoaspidospermidine skeleton (C-H activation) and a Witkop photocyclization reaction providing a 9-membered lactam. It is also worth mentioning that the joint synthetic sequence can be carried out on a multigram scale.

Chemical Communications (Cambridge, United Kingdom) published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, Quality Control of 69361-41-7.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Seath, Ciaran P. published the artcileTandem Chemoselective Suzuki-Miyaura Cross-Coupling Enabled by Nucleophile Speciation Control, Recommanded Product: (3-Bromo-5-methoxyphenyl)boronic acid, the publication is Angewandte Chemie, International Edition (2015), 54(34), 9976-9979, database is CAplus and MEDLINE.

Control of boronic acid speciation is presented as a strategy to achieve nucleophile chemoselectivity in the Suzuki-Miyaura reaction. Combined with simultaneous control of oxidative addition and transmetalation, this enables chemoselective formation of two C-C bonds in a single operation, providing a method for the rapid preparation of highly functionalized carbogenic frameworks.

Angewandte Chemie, International Edition published new progress about 849062-12-0. 849062-12-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is (3-Bromo-5-methoxyphenyl)boronic acid, and the molecular formula is C8H15NO, Recommanded Product: (3-Bromo-5-methoxyphenyl)boronic acid.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary