Tag: M.W=200-250

Khansole, Sandeep V. published the artcileConvenient and efficient method for the iodination of aromatic amines by pyridinium iodochloride, Quality Control of 6443-90-9, the publication is Synthetic Communications (2008), 38(11), 1792-1798, database is CAplus.

A simple and efficient method for the iodination of aromatic amines using pyridinium iodochloride in methanol as solvent was reported. Mild reaction conditions, short reaction time, and good to excellent yields of the product are the noteworthy advantages of the method. Pyridinium iodochloride is an efficient solid iodinating reagent and can be handled safely.

Synthetic Communications published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Quality Control of 6443-90-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Dudkina, Yulia B. published the artcileComposing NLO Chromophore as a Puzzle: Electrochemistry-based Approach to Design and Effectiveness, SDS of cas: 638-45-9, the publication is ChemPhysChem (2021), 22(22), 2313-2328, database is CAplus and MEDLINE.

A series of D-π-A, D-π-D’-π-A, D-π-A’-π-A nonlinear optical chromophores with vinylene π-electron bridges or bridges with π-deficient/π-excessive heterocyclic moieties along with the corresponding precursors D-vinylene, D-π-D’, D’-π-A, D-π-A’ and A’-π-A are synthesized and studied both exptl. and computationally. The effect of the heterocycle in the π-electron bridge on the oxidation/reduction potentials and the energy gap (ΔE^el) is investigated in detail. The properties of the D-π-A'(D’)-π-A chromophores are shown to correlate with those of building blocks: the oxidation potential is determined by the D-vinylene, and the reduction potential is determined by A'(D’)-π-A truncated compounds The contribution of the acceptor to the oxidation potential of chromophores in comparison with those of the precursors was estimated and analyzed in terms of electronic communication between the end groups. A good correlation between the ΔE^el and the chromophores’ first hyperpolarizability is revealed.

ChemPhysChem published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, SDS of cas: 638-45-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Kotani, Yuzo published the artcileRe(V)-Mediated Living Radical Polymerization of Styrene:¹ ReO₂I(PPh₃)₂/R-I Initiating Systems, HPLC of Formula: 31253-08-4, the publication is Macromolecules (1999), 32(8), 2420-2424, database is CAplus.

Rhenium(V) iododioxobis(triphenylphosphine) [ReO₂I(PPh₃)₂] proved an effective metal catalyst for living radical polymerization of styrene in conjunction with alkyl iodides as initiators [R-I: CH₃CH(Ph)I, (CH₃)₂C(CO₂Et)I, and CH₃CH(CO₂Et)I] in the presence of Al(Oi-Pr)₃. Compared to RuCl₂(PPh₃)₃, the group 7 complex was highly effective for styrene, so as to induce living polymerization even at 30° to yield well-controlled polystyrene, with M_n up to ∼4 × 10⁴ and narrow mol. weight distribution (MWD) (M_w/M_n = 1.19). The polystyrene thus obtained possessed one initiator moiety (R) at the α-end and one iodine atom at the ω-end, both from the initiator R-I, which indicates that the polymerization proceeds via activation of the C-I terminal, derived from R-I, by the Re(V) complex. Addition of methanol or water did not inhibit the polymerization, while a stable nitroxide radical (TEMPO) immediately and completely quenched it. The quenching experiments thereby supported intervention of radical species in the Re(V)-mediated living polymerization

Macromolecules published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C5H9IO2, HPLC of Formula: 31253-08-4.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Kotani, Yuzo published the artcileTransition metal-mediated living radical polymerization of styrene: design of initiating systems, COA of Formula: C5H9IO2, the publication is Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) (1999), 40(2), 468-469, database is CAplus.

A review with 5 references on development of catalysts based on transition metals for living radical polymerization of styrene. In transition metal-mediated living radical polymerization of styrene, ruthenium(II) complexes were used as catalysts and various haloorg. compounds, especially iodo-organic compounds, e.g., phenylethyl iodide, were used as initiators. The initiators were evaluated in terms of control of mol. weight and polydispersity. Complexes of Rhenium(V), were also used in conjunction with alkyl iodide initiators. Initiating systems based on half-metallocene-type iron(II) catalysts were developed, e.g., FeCp(CO)2I induced living radical polymerization of styrene resulting in polystyrene with narrow mol. weight distribution (Mw/Mn_p1.05-1.09).

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C5H9IO2, COA of Formula: C5H9IO2.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Tang, Min-Min published the artcileRole of Rim Functions in Recognition and Selectivity of Small-Molecule Guests in Water-Soluble Cavitand Hosts, Computed Properties of 638-45-9, the publication is Chemistry – An Asian Journal (2022), 17(15), e202200466, database is CAplus and MEDLINE.

Groups on the upper rim of cavitands can play major roles in the recognition of small mols. Water-soluble deep cavitands 1, 2 or 3 bearing the walls upper rim of imidazole, urea, and Me urea, resp., were synthesized and characterized as hosts of small-mol. guests. The vase forms of 1 or 2 are stabilized through H-bonding to solvent water mols. between adjacent walls. Various small alkyl organic mols. – alcs., halides, cycloalkane derivatives and heterocycles – are efficiently bound in 1. For n-alcs. (C5 to C12), the -OH end is fixed at the upper rim and the alkyl parts are in the hydrophobic cavity. The longer alc. guests (C7-C12) show coiling. Cycloalkane guests rotate rapidly on all 3 axes within the host cavity, while heterocycles show orientations placing their heteroatoms near the cavitand rim. Competition studies between alkyl chlorides, bromides and iodides showed preference for binding of iodides in 1. Competition between cavitands for hexyl halide guests halide showed the order 2>1>3.

Chemistry – An Asian Journal published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C24H20Ge, Computed Properties of 638-45-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Takeuchi, Naoki published the artcileSyntheses and anti-histaminic and anti-allergic activities of hexahydro-4-hydroxy-1-benzofuran-2-ones, Name: Ethyl 2-Iodopropionate, the publication is Chemical & Pharmaceutical Bulletin (1984), 32(6), 2249-61, database is CAplus and MEDLINE.

Benzofuranones I (R = H, R¹ = β-HO; R = Me, R¹ = α-HO, β-HO), which are related to the 6β-hydroxyeremophilenolides which show anti-histaminic and anti-allergic activities, were prepared from dimedone via dihydroxybenzofuranones II followed by dehydration reactions. I (R = H, Me; R¹ = β-HO) have anti-histaminic activity and cause marked inhibition in the Schultz-Dale reaction.

Chemical & Pharmaceutical Bulletin published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C38H74Cl2N2O4, Name: Ethyl 2-Iodopropionate.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Antia, M. B. published the artcileReformatskiǐ condensation of ketonic esters with halo esters, Recommanded Product: Ethyl 2-Iodopropionate, the publication is Agra Univ. J. Research, Science (1954), 197-201, database is CAplus.

Condensation of Et levulinate (I) with halo esters yields substituted butyrolactones. Thus 7.2, g. I, 8.1 g. MeCHBrCO₂Et (b₂₅₀ 124°), and 3.3 g. Zn in dry C₆H₆ heated 0.5 hr. on a water bath, the mixture treated with 2N H₂SO₄, the C₆H₆ layer washed with 10% Na₂CO₃, dried, the C₆H₆ evaporated, and the residue distilled gave 4.4 g. O.CO.(CH₂)₂.CMeCHRCO₂Et (II, R = Me) (III), b₄ 160°, b₃ 156°. The same reaction in xylene gave 4 g. III. MeCHICO₂Et (b₇₁₄ 196°) did not react with I under either of the above conditions. Similarly 10 g. EtCHBrCO₂Et (b₇₅ 106°) gave 3.5 g. II (R = Et), b₆ 183-5°, and 15 g. Et 2-bromolaurate (b₁₀ 172-4°) gave 2.0 g. II [R = Me(CH₂)₉], b₄ 162-4°. AcCH₂CO₂Et 6.5, ClCO₂Et (IV) 5.4, Zn 3.2, reduced Cu powd. 0.2 g., and 30 ml. dry C₆H₆ refluxed 8 hrs., during which time 1 g. IV was added, gave 2 g. EtO₂CCH₂CMe(OH)CO₂Et, b₈ 156-60°.

Agra Univ. J. Research, Science published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C5H9IO2, Recommanded Product: Ethyl 2-Iodopropionate.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com