Month: November 2022

Hussain, Nazar published the artcileSynthesis of Sugar-Based Enones and Their Transformation into 3,5-Disubstituted Furans and 2-Acyl-Substituted 1,2,3-Trideoxy Sugars in the Presence of Lewis Acids, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid, the publication is Organic Letters (2019), 21(9), 3034-3037, database is CAplus and MEDLINE.

Pd-catalyzed carbonylative cross-coupling reactions of 2-iodoglycals have been developed for the synthesis of sugar-based arylones and ynones using formic acid as the carbonyl source. Whereas acetyl-protected arylones lead to the formation of highly substituted furan derivatives in the presence of Lewis acid, benzyl-protected arylones furnished the 3-deoxy sugar derivative In the presence of nucleophiles, an attack took place on the C-1 or C-3 carbon regio- and stereoselectively depending on the nature of the nucleophiles.

Organic Letters 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 C7H8BBrO3, Recommanded Product: 2-Bromo-5-methoxybenzene boronic acid.

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

Adane, Legesse published the artcileDesign and synthesis of guanylthiourea derivatives as potential inhibitors of Plasmodium falciparum dihydrofolate reductase enzyme, Application In Synthesis of 76283-09-5, the publication is Bioorganic & Medicinal Chemistry Letters (2014), 24(2), 613-617, database is CAplus and MEDLINE.

A new class of compounds, e.g. I [R = 3,4-(MeO)₂C₆H₃; 3-PhC₆H₄, 4-CF₃C₆H₄, etc.], based on S-benzylated guanylthiourea has been designed as potential Plasmodium falciparum dihydrofolate reductase inhibitors using computer aided methods (mol. electrostatic potential, mol. docking). Several compounds in this class have been synthesized starting from guanylthiourea and alkyl bromides. In vitro studies showed that two compounds from this class are active with the IC₅₀ value of 100 μM and 400 nM.

Bioorganic & Medicinal Chemistry Letters published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, Application In Synthesis of 76283-09-5.

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

Mitrofanov, A. Yu. published the artcileCu(I) complexes with diethoxyphosphoryl-1,10-phenanthrolines in catalysis of C-C and C-heteroatom bonds formation, Safety of Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), the publication is Inorganica Chimica Acta (2015), 297-301, database is CAplus.

Diethoxyphosphoryl substituted 1,10-phenanthroline Cu(I) complexes were tested as catalysts in the Sonogashira-type reaction, α-arylation of phosphoryl-stabilized C-H acids, C-N, C-P bond forming reactions (substitution reactions) and in the reaction of phenylacetylene and bis(pinacolato)diboron (addition reaction). The complexes demonstrate fairly high catalytic activity and in some cases their efficiency is superior to that of the parent Cu(phen)(PPh₃)Br (phen = phenanthroline).

Inorganica Chimica Acta published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C30H24BrCuN2P, Safety of Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I).

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

Huck, L. published the artcileReformatsky and Blaise reactions in flow as a tool for drug discovery: one pot diversity oriented synthesis of valuable intermediates and heterocycles, Recommanded Product: Ethylbromofluoroacetate, the publication is Green Chemistry (2017), 19(6), 1420-1424, database is CAplus.

The application of Reformatskii and Blaise reactions for the preparation of a diverse set of valuable intermediates and heterocycles, e.g., I in a one-pot protocol was described. To achieve this goal, a greener activation protocol for zinc in flow conditions was developed to introduce this metal efficiently into α-bromoacetates. The organozinc compounds were added to a diverse set of ketones and nitriles to obtain a wide range of functional groups and heterocyclic systems.

Green Chemistry published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C4H6BrFO2, Recommanded Product: Ethylbromofluoroacetate.

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

Storch, Jan published the artcileIntramolecular cascade hydroarylation/cycloisomerization strategy for the synthesis of polycyclic aromatic and heteroaromatic systems, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is European Journal of Organic Chemistry (2013), 2013(2), 260-263, database is CAplus.

A new PtCl₂/PtCl₄-catalyzed hydroarylation/cycloisomerization cascade reaction leading to the formation of two aromatic or heteroaromatic rings in one step is reported. The strategy developed is exemplified by the synthesis of the 5,6-dihydrobenzo[c]phenanthrene and 6H-naphtho[2,1-c]chromene skeletons. Attempts to prepare [8]helicene-like mols. are also discussed.

European Journal of Organic 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 C15H14O3, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane.

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

Woods, Eliot F. published the artcilePhotocontrolled Synthesis of n-Type Conjugated Polymers, Category: bromides-buliding-blocks, the publication is Angewandte Chemie, International Edition (2020), 59(15), 6062-6067, database is CAplus and MEDLINE.

Current approaches to synthesize π-conjugated polymers (CPs) are dominated by thermally driven, transition-metal-mediated reactions. Herein we show that electron-deficient Grignard monomers readily polymerize under visible-light irradiation at room temperature in the absence of a catalyst. The product distribution can be tuned by the wavelength of irradiation based on the absorption of the polymer. Conversion studies are consistent with an uncontrolled chain-growth process; correspondingly, chain extension produces all-conjugated n-type block copolymers. Preliminary results demonstrate that the polymerization can be expanded to donor-acceptor alternating copolymers. We anticipate that this method can serve as a platform to access new architectures of n-type CPs without the need for transition-metal catalysis.

Angewandte Chemie, International Edition 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 C8H6ClN, Category: bromides-buliding-blocks.

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

Nazarov, I. N. published the artcileStereochemistry of addition reactions at a triple bond. III. Stereochemistry of bromination of propargyl alcohols, HPLC of Formula: 594-81-0, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1960), 887-95, database is CAplus.

cf. CA 52, 3660g, 19925f. Photochem. bromination of HCCCH₂OH (I) yielded trans-dibromide, while the tertiary acetylenic alcs. and acetates yielded mainly cis-dibromides. I and the calculated amount of Br in CCl₄ added at 25° under ultraviolet light gave 74% 2,3-dibromo-2-propen-1-ol, b₁ 55-6°, m. 28-30°, whose trans structure was confirmed by infrared spectrum (shown). Bromination of dimethylethynylcarbinol in hexane under ultraviolet light gave 2,3-dibromo-2,3-dimethylbutane, m. 173-5°, and mainly a stereoisomeric mixture of dibromovinyldimethylcarbinols, b₆ 76-80°, n_D²⁰ 1.5422, containing not over 8% trans isomer. Similar bromination of HCCCMe₂OAc gave a little 2,3-dibromo-2,3-dimethylbutane, m. 172-5°, and 77% stereoisomers of AcOCMe₂CBr:CHBr, b₂ 71-4.5°, n_D^21.5 1.5184, containing not over 11% trans isomer. Similar bromination in AcOH gave the above mixture, b₁₀ 80-103°, a fraction, b₁₀ 103-8°, n_D²⁰ 1.4909 [which with semicarbazide gave bromoacetyldimethylcarbinyl acetate semicarbazone, m. 102-5° (CA 36, 745⁸)], and a polybromoketone, b₃ 91-106°, 1.5278. The mother liquors yielded with semicarbazide bromoacetyldimethylcarbinylsemicarbazide, m. 125-6°. cis-Dibromovinyldimethylcarbinyl acetate with MeONa-MeOH (loc. cit.) in the cold gave cis-dibromoethylene, containing not over 5% trans isomer, and mostly dimethylbromoethynylcarbinol, b₁₇ 68-70°; p-nitrobenzoate m. 88.5-9.5° (Straus, et al., CA 25, 71). The residues yielded some Me₂C:CHCO₂H. trans-CHBr: CBrCMe₂OH with Ac₂OH₂SO₄ in the cold gave mainly trans-3,4-dibromoisoprene and trans-CHBr:CBrCMe₂OAc, b₁ 68-9°, 1.513-6, which with MeONa-MeOH gave trans-dibromoethylene and trans-CHBr:CBrCMe₂OH. The latter and powd. KOH in Et₂O in 2 hrs. at 35° gave 22% dibromoethylene, containing not over 16% cis form, along with unreacted material and some (CCMe₂OH)₂. Bromination of 1-ethynylcyclohexyl acetate in hexane under ultraviolet light gave 82% cis-1-(dibromovinyl)cyclohexyl acetate, b_2.5 116-18°, n_D¹⁹ 1.5321. Similar bromination in AcOH at room temperature gave 60% 1-acetoxy-1-(dibromoacetyl)cyclohexanone, m. 51.5-2°, and mixed stereoisomers of 1-(dibromovinyl)cyclohexyl acetates, b₁ 101-4°, containing not over 13% cis-isomer. Keeping cis-1-(dibromovinyl)cyclohexyl acetate with alc. KOH 3 days gave 69% 1-bromoethynylcyclohexanol, m. 54.5-6°, and 13.5% cyclohexylideneacetic acid; S-benzylthiuronium salt m.162-3°. trans-1-(Dibromovinyl)cyclohexanol with Ac₂OH₃PO₄ gave the corresponding acetate, b_1.2 105.5-6°, n_D²⁰ 1.5388. Ultraviolet irradiation of trans-dibromovinyldimethylcarbinol in hexane in the presence of a trace of Br 4 hrs. gave 81% cis-isomer; longer irradiation failed to increase this conversion. The trans-isomer kept 2 months in the dark yielded 69% cis-isomer. Irradiation of trans-(dibromovinyl)dimethylcarbinyl acetate gave also a mixture of cis-trans isomers containing 78% cis-form. The liquid trans-1-(dibromovinyl)cyclohexanol, illuminated in hexane solution, solidified and gave some 79% cis-isomer; keeping the trans-isomer 6 months in the cold gave 62% cis-isomer, m. 66-70°. The estimation of cis-trans isomers was done with the aid of infrared spectra, which were shown.

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, HPLC of Formula: 594-81-0.

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

Verma, Naimish K. published the artcileRegioselective Synthesis of 1,4,5-Trisubstituted 1,2,3-Triazole Derivatives from α,β-Unsaturated Carbonyls, Computed Properties of 143-15-7, the publication is European Journal of Organic Chemistry (2022), 2022(28), e202200317, database is CAplus.

The copper-catalyzed oxidative azide-olefin cycloaddition (OAOC) reaction of differently substituted α,β-unsaturated carbonyls with azides provided an efficient method for preparing biol. active 1,4,5-trisubstituted 1,2,3-triazoles. In this study, the cycloaddition reaction was found to be a simple and powerful method for constructing diverse mono- and bis-(1,4,5-trisubstituted 1,2,3-triazole) functionalized heterocyclic compounds in moderate to high yields with great regioselectivity. The XRD-anal. data of one of the bis-triazole derivatives supported the regioselectivity as well as the conformity of the method in the construction of the triazole nucleus. The preliminary antifungal profile against C. albicans was observed with cinnamaldehyde-based triazole derivatives demonstrating promising results.

European Journal of Organic Chemistry published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C23H43NP2, Computed Properties of 143-15-7.

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

Keller, Austin N. published the artcileDesign and Characterization of Aprotic N-Heterocyclic Anion Ionic Liquids for Carbon Capture, Computed Properties of 111-83-1, the publication is Journal of Chemical & Engineering Data (2022), 67(2), 375-384, database is CAplus.

The transport properties, thermal properties, and CO₂ solubility for several ionic liquids (ILs) with triethyl(octyl)phosphonium cations and a variety of CO₂-reactive aprotic N-heterocyclic anions (AHAs) are reported in this work. Eleven new ILs were designed and synthesized. They were characterized in terms of their m.ps., glass transition temperatures, decomposition temperatures, viscosities and densities (where possible), as well as their CO₂ capacity as a function of pressure. Of the 11, 3 were solid at room temperature, 1 was a room-temperature liquid which remained liquid upon reaction with CO₂, and 7 others were liquids that crystallized at room temperature upon reaction with CO₂, so experimentation at elevated temperatures was required. The CO₂ uptake isotherms for seven of the ILs, at temperatures ranging from 49 to 64°C and pressures from 0 to 80 kPa, were fit to a Langmuir model. The CO₂ solubility for several of these ILs was among the highest reported at these temperatures and pressures for AHA ILs in the literature, but they have lower thermal stability and higher viscosity than other promising AHA ILs.

Journal of Chemical & Engineering Data published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Computed Properties of 111-83-1.

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

Adam, Julia M. published the artcileCyclodextrin-Derived Host Molecules as Reversal Agents for the Neuromuscular Blocker Rocuronium Bromide: Synthesis and Structure-Activity Relationships, SDS of cas: 55788-44-8, the publication is Journal of Medicinal Chemistry (2002), 45(9), 1806-1816, database is CAplus and MEDLINE.

A series of mono- and per-6-substituted cyclodextrin derivatives were synthesized as synthetic receptors (or host mols.) of rocuronium bromide, the most widely used neuromuscular blocker in anesthesia. By forming host-guest complexes with rocuronium, these cyclodextrin derivatives reverse the muscle relaxation induced by rocuronium in vitro and in vivo and therefore can be used as reversal agents of the neuromuscular blocker to assist rapid recovery of patients after surgery. Because this supramol. mechanism of action does not involve direct interaction with the cholinergic system, the reversal by these compounds is not accompanied by cardiovascular side effects usually attendant with acetylcholinesterase inhibitors such as neostigmine. The structure-activity relationships are consistent with this supramol. mechanism of action and are discussed herein. These include the effects of binding cavity size and hydrophobic and electrostatic interaction on the reversal activities of these compounds

Journal of Medicinal 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, SDS of cas: 55788-44-8.

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