Tag: M.W=200-250

Kalaivanan, R. published the artcileSynthesis, growth and characterization of organic nonlinear optical material: N-benzyl-2-methyl-4-nitroaniline (BNA), Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline, the publication is Optics & Laser Technology (2017), 27-32, database is CAplus.

Synthesis of the organic nonlinear optical compound N-benzyl-2-methyl-4-nitroaniline (BNA) was carried out in a newer chem. environment using the mixture of benzyl chloride and 2-methl-4-nitroaniline by a preferred laboratory synthesis process. The synthesized BNA compound was separated by column chromatog. (CC) with low pressure silica gell using petrollium benzine and purity of the separated resultant product was confirmed by thin layer chromatog. (TLC). Further, the material was recrystallized atleast four times in methanol and the highly purified BNA was used for the growth of single crystals from solutions with selected solvents by slow evaporation method at room temperature Single crystals having natural growth morphol. were harvested and their different growth faces were identified by optical goniometry. The grown crystals were subjected to different characterization techniques such as powder x-ray diffraction (PXRD), fourier transform IR spectroscopy (FTIR), differential scanning calorimetry (DSC) and UV-vis-Near IR spectroscopy. Further, the second harmonic generation (SHG) efficiency of the grown BNA crystal was studied by Kurtz and Perry powder technique using Nd:YAG laser as fundamental source and found to be twice that of inorganic standard KDP.

Optics & Laser Technology published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C14H14N2O2, Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kalaivanan, Raju published the artcileEffective Separation of N-benzyl-2-methyl-4-nitroaniline (BNA) Polymorphs through Antisolvent Crystallization Method, Application In Synthesis of 201157-13-3, the publication is Crystal Research and Technology (2018), 53(7), n/a, database is CAplus.

The Influence of antisolvent water on the polymorphic nucleation of N-benzyl-2-methyl-4-nitroaniline (BNA) during its crystallization from methanol solution is revealed. The solubility of BNA in methanol-water solvent mixtures is determined by gravimetric method and the variation in the level of supersaturation generated with respect to antisolvent concentration is assessed at different volume combinations of saturated methanol BNA solution and water. The supersaturation dependent polymorphic nucleation of orthorhombic and monoclinic forms and their growth morphologies such as platy-like orthorhombic and needle-like monoclinic are examined through in-situ optical microscopy. Single crystals of the grown polymorphs are successfully separated and their structural, thermal, spectroscopic and optical transmittance properties are confirmed through PXRD, DSC, FTIR and UV-Vis-near IR analyses resp.

Crystal Research and Technology published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C14H14N2O2, Application In Synthesis of 201157-13-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Palaniappan, An. published the artcileKinetics and mechanism of oxidation of some meta- and para- substituted phenoxyacetic acids by N-chloropiperazine-2,5-dione in non-aqueous medium, SDS of cas: 1798-04-5, the publication is Asian Journal of Chemistry (2002), 14(2), 607-613, database is CAplus.

The kinetics of oxidation of a number of meta- and para- substituted phenoxyacetic acids by N-chloropiperazine-2,5-dione (NCPD) were studied in methanol medium. The reaction shows unit order dependence with respect to oxidant and the order with respect to substrate varies depending on the nature of the substituent present in the ring. The rate is showing an inverse order of dependence with respect to [TsOH]. The rate increases with decrease in the percentage of methanol. Increase in ionic strength has no effect on the reaction rate. From the kinetic data obtained the activation parameters were computed and a suitable mechanism was proposed in accordance with multiparameter correlation anal.

Asian Journal of Chemistry published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, SDS of cas: 1798-04-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wlodarczyk, Katarzyna published the artcileIntramolecular cationic cyclization of ¦Â-hydroxyalkylphosphine oxides-a route towards the benzophosphorinane core, Safety of Allyldiphenylphosphine oxide, the publication is Tetrahedron (2016), 72(33), 5074-5090, database is CAplus.

Intramol. cationic cyclization of ¦Â-hydroxyalkylphosphine oxides in the presence of an acid gives fused bicyclic compounds with an incorporated P atom. Depending on the structure of the starting compound the formation of either phosphaindane or benzophosphorinane oxides was observed The key difference in the reactivity arises from the substitution pattern at the carbinolic C atom of ¦Â-hydroxyalkylphosphine oxide.

Tetrahedron published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C7H5Br2F, Safety of Allyldiphenylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Nawrocka, Wanda P. published the artcileSynthesis of New 4(3H)-Quinazolinone Derivatives by Reaction of 3-Amino-2(1H)-thioxo-4(3H)-quinazolinone with Selected Substituted Cinnamic Acids and Halogenoketones, Application In Synthesis of 16909-09-4, the publication is Phosphorus, Sulfur and Silicon and the Related Elements (2008), 183(6), 1379-1387, database is CAplus.

Two series of N-acylated and S-alkylated 4(3H)-quinazolinone derivatives, e.g., I (R = H, Me, MeO, F, Cl, Br, NO₂), have been synthesized by reaction of 3-amino-2(1H)-thioxo-4(3H)-quinazolinone with substituted cinnamic acids or halogenoketones (phenacyl bromides), resp.

Phosphorus, Sulfur and Silicon and the Related Elements published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Application In Synthesis of 16909-09-4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Uhl, Werner published the artcileGa-Ga Bonds as Key Building Blocks for the Formation of Supramolecular Entities – Unusual Macrocyclic Tetra- and Octagallium Compounds, Application of 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is European Journal of Inorganic Chemistry (2017), 2017(15), 2270-2278, database is CAplus.

Treatment of the digallium compound R₂Ga-GaR₂ (1) [R = CH(SiMe₃)₂] with the dicarboxylic acids 1,2- and 1,4-(HO₂CCH₂O)₂C₆H₄ afforded, by the release of H₂C(SiMe₃)₂, macrocyclic compounds 2a and 2c, in which two organic spacer ligands connect two metal-metal bonds. Two CO₂ groups bridge each Ga-Ga bond, and different structures resulted with a parallel or perpendicular arrangement of the bridging ligands. The resorcinol derivative 1,3-(HO₂CCH₂O)₂C₆H₄ yielded the unique compound 2b, in which four Ga-Ga bonds are bridged by four spacer ligands. The organic groups form loops, which are alternately arranged above and below the mol. plane with four saddle points and a structure approaching 4 symmetry. The 1,2- and 1,4-diacids afforded tetrakis(digallium) compounds 3a and 3c in the presence of water. In both cases carboxylate groups and hydroxido ligands bridge two Ga atoms of two different Ga-Ga bonds. The spacer ligands connect two of these fragments and adopt parallel orientations to form mol. boxes. Again, the 1,3-diacid afforded a unique structural motif in which a Ga₄O₆ skeleton (two Ga-Ga bonds) is bridged by a single organic spacer, reminiscent of the handle of a basket.

European Journal of Inorganic Chemistry published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C18H35NO, Application of 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wong, Marie L. J. published the artcileDirect catalytic asymmetric synthesis of ¦Á-chiral bicyclo[1.1.1]pentanes, HPLC of Formula: 22693-41-0, the publication is Nature Communications (2021), 12(1), 1644, database is CAplus and MEDLINE.

An approach to synthesize ¦Á-chiral bicyclo[1.1.1]pentanes I (R = Me, Bn, thiophen-2-yl, etc.) (BCPs) involving the direct, asym. addition of simple aldehydes RCH₂CHO to [1.1.1]propellane, the predominant BCP precursor was described. This is achieved by combining a photocatalyst and an organocatalyst to generate a chiral ¦Á-iminyl radical cation intermediate, which installs a stereocenter simultaneously with ring-opening of [1.1.1]propellane. The reaction proceeds under mild conditions, displays broad scope, and provides an array of ¦Á-chiral BCPs I in high yield and enantioselectivity. They also present a theor. model for stereoinduction in this mode of photoredox organocatalysis.

Nature Communications published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C8H7NO4, HPLC of Formula: 22693-41-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Bowman, Robert S. published the artcileSteric and resonance effects in the tert-butyl and isobutylphenols, Computed Properties of 1798-04-5, the publication is Journal of the American Chemical Society (1957), 87-92, database is CAplus.

C₆H₆ treated with Me₂C:CH₂ (I) in the presence of H₂O.BF₃ gave Me₃CPh (II), b₇₄₁ 168.8¡ã, n_D²⁰ 1.4880. PhOH treated with I at 70¡ã in the presence of 5% by weight H₂SO₄ yielded p-Me₃CC₆H₄OH (III), b₂₀ 130.0¡ã, m. 100¡ã; p-Me₃CC₆H₄OCH₂CO₂H, m. 96.5¡ã. PhOH treated with I at 40-5¡ã in the presence of 0.1% H₂SO₄ gave mainly o-Me₃CC₆H₄OH (IV), b₂₀ 113.0¡ã. PhOH in Et₂O treated at 10¡ã in the presence of dilute H₂SO₄ with I gave mainly Me₃COPh (V), b₂₀ 80.0¡ã, n_D²⁰ 1.4869. p-O₂NC₆H₄CMe₃ hydrogenated under ambient conditions over Pd-C yielded 90% p-Me₃CC₆H₄NH₂, iso-PrBz treated at 0¡ã with fuming HNO₃ in AcOH gave 60-70% m-O₂NC₆H₄COCHMe₂ (VI), m. 37¡ã, which oxidized gave p-O₂NC₆H₄CO₂H, m. 141¡ã. VI in glacial AcOH hydrogenated under ambient conditions over Pd-C (from 8 g. 10% PdCl₂ and 20 g. Norit A), the mixture basified with NaOH and extracted with C₆H₆, and the resulting amino compound diazotized and hydrolyzed in HCl gave 19% m-Me₂CHCOC₆H₄OH (semi-carbazone, m. 188¡ã with darkening), which reduced by the method of Huang-Minlon (C.A. 41, 1649a) gave m-Me₂CHCH₂C₆H₄OH (VII), b₂₀ 129.5¡ã; m-Me₂CHCH₂C₆H₄OCH₂CO₂H, m. 90.5¡ã. By conventional methods were prepared the following compounds: m-Me₃C₆H₄OH (VIII), b₂₀ 129.5¡ã, m. 43.0 (m-Me₃CC₆H₄OCH₂CO₂H, m. 116.5¡ã); o-iso-BuC₆H₄OH (IX), b₂₀ 116.5¡ã [o-iso-BuC₆H₄OCH₂CO₂H (X), m. 96.5¡ã]; p-isomer (XI) of IX, b₂₀ 131.0¡ã, m. 48.0¡ã (p-isomer of X, m. 109.5¡ã); iso-BuOPh (XII), b₂₀ 93.0¡ã, n_D²⁰ 1.4929; iso-BuPh (XIII), b₂₀ 67.5¡ã, n_D²⁰ 1.4854. The various Bu compounds were thermally decomposed at initial pressures of 150-400 mm. at 420.0 ¡À0.1¡ã in a specially designed, completely Pyrex glass system and the pressure changes measured. On the basis of the thermal decomposition the compounds can be arranged in the following order of decreasing stability: VIII > II> III > XIII > VII> XI > IV > IX > XII > V. The 1st order rate of the thermal decomposition of IV was determined at 4 temperatures (temperature and k ¡Á 10⁴ given): 383.0¡ã, 11.72 ¡À 0.44; 392.6¡ã, 21.12 ¡À 0.60; 403.2¡ã, 44.39 ¡À 0.59; 413.3¡ã 89.75 ¡À 0.85; activation energy 58.4 kcal./mole. The content of the gaseous hydrocarbons formed in the thermal decomposition of the Bu compounds was determined (compound pyrolyzed, mole-% CH₄, C₃H₈, C₃H₆, iso-C₄H₁₀, iso-C₄H₈, and H given): IV, 20, 3, 56, -, 16, 1; IX, 24, 3, 66, -, 2, 2; VIII, 66, 12, 6, 2, 4, 7; VII, 69, 6, 14, -, 2,5; III, 58, 9, 4, 17, 8, 2; XI, 57, 28, 8, -, 2, 2; II, 41, 10, 6, 8,19 (and 3 C₂H₆), 8; V, 1, 1, -, 4, 93, -; XII, 9, 26, 7, 3, 22 (and 24% CO and 7% C₂H₆), -.

Journal of the American Chemical Society published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Computed Properties of 1798-04-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Sridhar, Gattu published the artcileZrCl₄-mediated synthesis of 1,2,3-triazoles from vinyl nitrates and their biological evaluation, Safety of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Synthetic Communications (2017), 47(6), 551-556, database is CAplus.

A ZrCl₄-mediated simple method for the conversion of vinyl nitrates to 1,2,3-triazoles in excellent yields was developed. The obtained new triazoles were evaluated for their antimicrobial activity.

Synthetic Communications published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C2H2N4O2, Safety of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ishii, Keitaro published the artcilePhotoreactions of ¦Â-aziridinylacrylonitriles and acrylates with alkenes: the substituent effects on the formation of [3+2] cycloadducts, SDS of cas: 4141-48-4, the publication is Tetrahedron (2006), 62(47), 10865-10878, database is CAplus.

The photochem. C,C-bond cleavage of trisubstituted aziridines I (R¹ = H, PhCH₂; R² = Me, Ph; R³ = H; R⁴ = CN, EtO₂C) followed by [3 + 2] cycloaddition with electron-deficient alkenes, such as tert-Bu acrylate, afforded the novel head-to-head adducts, 1,2,3,5-tetrasubstituted pyrrolidines, e.g. II, selectively and efficiently. The aziridine (cis,Z)-I (R¹ = PhCH₂; R² = Me; R³ = H; R⁴ = CN) reacted with mol. oxygen affording dioxazolidine III, whereas (trans,E)-I (R¹ = PhCH₂; R² = Ph; R³ = H; R⁴ = EtO₂C) produced only cleaved products. The results may suggest that the C,C-bond of aziridine cleaves biradically. The photoreactions of N-tritylaziridines I (R¹ = Ph₃C; R² = H; R³ = R⁴ = MeO₂C, CN; R³ = H, R⁴ = H₂C:CH) possessing diester, dinitrile, and butadiene groups in the side chain with electron-deficient alkenes, such as vinyl acetate or acrylonitrile, yielded 2,3-cis-pyrrolidines IV exclusively. In particular, the dinitrile I (R¹ = Ph₃C; R² = H; R³ = R⁴ = CN) also reacted with non-electron-deficient alkenes, such as isoprene. The formal synthesis of the indolizidine fragment of stellettamides starting from the pyrrolidine (E)-IV (R³ = H; R⁴ = H₂C:CH; R⁵ = CN) was achieved in a convenient manner.

Tetrahedron published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, SDS of cas: 4141-48-4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia