Category: 89003-95-2

Grimshaw, James; Prasanna de Silva, A. published the artcile< Photocyclization of aryl halides. Part 4. 5-(2-Halophenyl)-1,3-diphenyl-Δ2-pyrazolines. Predissociation and electron transfer between intramolecular but separate chromophores>, Formula: C8H4BrNO, the main research area is pyrazoline halophenyl diphenyl photocyclization; halophenyldiphenylpyrazoline photochem ring closure; phenylpyrazoline halophenyl photocyclization.

Photoreaction of 5-(2-iodophenyl)-1,3-diphenyl-Δ2-pyrazoline (I) proceeds by simple bond homolysis from the S1° state to give 1,3,5-triphenylpyrazoline and 2-phenylpyrazolo[1,5-f]phenanthridine in a ratio which depends on the H atom donor ability of the hydrocarbon solvent. The quantum yield for decomposition of I depends on the viscosity of the hydrocarbon solvent and on the temperature The corresponding chloro and bromo compounds cyclize slowly and the 3-iodo- and 4-iodophenyl compounds are photostable. Consideration of these facts and the complementary fluorescence data suggests a mechanism of interchromophoric predissociation to an nσ* state. However, examples are given where there is a smaller electron donor-acceptor energy gap between the 2 chromophores so that photoreaction occurs by an electron transfer path.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about Photocyclization. 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, Formula: C8H4BrNO.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhan, Yizhou; Liu, Tao; Ren, Jun; Wang, Zhongwen published the artcile< Lewis Acid-Catalyzed Intramolecular [3+2] Cross-Cycloaddition of Aziridine 2,2-Diesters with Conjugated Dienes for Construction of Aza-[n.2.1] Skeletons>, Quality Control of 89003-95-2, the main research area is Lewis acid intramol cross cycloaddition aziridine diester conjugate diene; aza skeleton preparation; aziridine; bridged ring; cycloaddition; medium-sized ring; regioselectivity.

A novel Lewis acid-catalyzed [3+2] intramol. cross-cycloaddition (IMCC) between aziridine 2,2-diesters and conjugated dienes has been developed. This is the first regiospecific IMCC of intramol. 1,3-dipolar cycloadditions of azomethine ylides with carbon=carbon double bonds, and supplies a general and efficient strategy for construction of structurally complex and diverse aza-[n.2.1] skeletons, e.g. I. The [3+2]IMCC could be carried out under mild conditions and in gram scale. More importantly, 3-alkyl-substituted aziridines were also successful. The excellent structural diversity, the facile operation and the versatile post-modifications will support the applications of the [3+2]IMCC in natural products synthesis and drugs discovery.

Chemistry – A European Journal published new progress about Aziridines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, Quality Control of 89003-95-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Cody, John; Fahrni, Christoph J. published the artcile< Fluorescence sensing based on cation-induced conformational switching: copper-selective modulation of the photoinduced intramolecular charge transfer of a donor-acceptor biphenyl fluorophore>, Recommanded Product: 4-Bromo-3-formylbenzonitrile, the main research area is fluorescence sensing cation induced conformational switching copper selective modulation; photoinduced intramol charge transfer donor acceptor biphenyl fluorophore.

The fluorescence emission energy of donor-acceptor substituted biphenyls is highly sensitive towards conformational changes of the interannular twist angle. By integrating 4-dimethylamino-4′-cyano-biphenyl into the ligand backbone of a thioether-rich metal receptor we designed a fluorescence sensor that exhibits high selectivity towards copper. Upon metal binding the ligand undergoes a significant conformational change, which induces a strong hypsochromic shift of the photoinduced charge-transfer emission. Steady-state absorption and fluorescence spectroscopy revealed a high affinity towards Cu(I) with a well-defined 1:1 metal-ligand complex stoichiometry. The nature of the conformational changes upon Cu(I) coordination were analyzed in detail by 1H NMR and 2D NOESY experiments The spectroscopic data provide a coherent picture, which is consistent with a Boltzmann ground-state distribution of several rotamers that are locked into a more flattened geometry upon coordination of Cu(I).

Tetrahedron published new progress about Fluorescence spectroscopy. 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, Recommanded Product: 4-Bromo-3-formylbenzonitrile.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Parhi, Biswajit; Gurjar, Jitendra; Pramanik, Suman; Midya, Abhisek; Ghorai, Prasanta published the artcile< Correction to ""Organocatalytic Enantioselective Intramolecular Oxa-Michael Reaction of Enols: Synthesis of Chiral Isochromene"" [Erratum to document cited in CA164:592807]>, COA of Formula: C8H4BrNO, the main research area is isochromene enantioselective synthesis erratum; oxa Michael reaction enol squaramide catalyst erratum.

The structure of the catalysts used in Table 1 was omitted from the publication; A full corrected Table 1 is provided.

Journal of Organic Chemistry published new progress about Benzopyrans Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, COA of Formula: C8H4BrNO.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary