Category: 156089-67-7

Yan, Lin-Jie published the artcile6,8-Dibromo-3-nitro-2-phenyl-2H-chromene, HPLC of Formula: 156089-67-7, the main research area is crystal structure dibromonitrophenylchromene; mol structure bromonitrophenylchromene; chromene dibromonitrophenyl crystal mol structure; benzopyran dibromonitrophenyl crystal mol structure; pyran dibromonitrophenylbenzo crystal mol structure; dibromonitrophenylbenzopyran crystal mol structure; bromonitrophenylbenzopyran crystal mol structure.

In 6,8-dibromo-3-nitro-2-phenyl-2H-chromene, C15H9Br2NO3, the chromene unit is not quite planar (root-mean-square deviation from planarity = 0.0888 Å). The dihydropyran ring adopts an envelope conformation with the phenyl-substituted C atom fused to the dihydropyran ring as the flap. The dihedral angle between the plane defined by this C atom and the adjacent C and O atoms and the mean plane of the dihydropyran ring excluding the phenyl-substituted C atom is 25.1(3)°. The dihedral angle between the mean plane of the chromene unit and the Ph ring is 85.7(1)°. The crystal structure features C-H···O H bonds and Br···O contacts [3.289(3) Å] involving the nitro O atoms. Crystallog. data are given.

Acta Crystallographica, Section E: Structure Reports Online published new progress about Conformation. 156089-67-7 belongs to class bromides-buliding-blocks, name is 4,5-Dibromo-2-hydroxybenzaldehyde, and the molecular formula is C7H4Br2O2, HPLC of Formula: 156089-67-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Samath, Sheik A. published the artcileSubstitutions of coordinated salicylaldehyde and its Schiff bases, Safety of 4,5-Dibromo-2-hydroxybenzaldehyde, the main research area is cobalt salicylaldehyde Schiff brominating agent reaction; copper salicylaldehyde Schiff brominating agent reaction; salicylaldehyde Schiff cobalt copper brominating agent; bromination cobalt copper salicylaldehyde Schiff; cyano substitution cobalt copper salicylaldehyde Schiff; succinimido substitution cobalt copper salicylaldehyde Schiff.

Several bis/tris-salicylaldehyde, salicylaldimine and salicylethylenediimine chelates of Co(III), Cr(III), Co(II), Ni(II) and Cu(II) readily react with various brominating agents and undergo α-bromo/cyano/succinimido substitution, with or without accompanying Br substitution of the aryl ring. The selectivity of these reactions on the metal-coordinated salicylaldehyde derivatives allows the preparation in 5-80% yield of hitherto unreported specific α-bromo products. Data are presented for several reactions with Co and Cu complexes. The substituted organic compounds could be isolated by demetalation of the chelate products.

Transition Metal Chemistry (Dordrecht, Netherlands) published new progress about Bromination. 156089-67-7 belongs to class bromides-buliding-blocks, name is 4,5-Dibromo-2-hydroxybenzaldehyde, and the molecular formula is C7H4Br2O2, Safety of 4,5-Dibromo-2-hydroxybenzaldehyde.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ravindernath, Anisetti published the artcileSynthesis and biological evaluation of benzo[d]imidazolyl chromeno[2,3-d]pyrimidinones, Quality Control of 156089-67-7, the main research area is benzimidazolyl chromenopyrimidinone preparation antibacterial antifungal antioxidant activity SAR.

A series of benzo[d]imidazolyl chromeno[2,3-d]pyrimidnones I (R = H, OMe, Br, Cl, R’ = H; R = R’ =Br) were described. The key intermediate 2-cyano-N-(2-mercapto-1H-benzo[d]imidazol-5-yl)acetamide (II) is obtained by reacting 5-amino-2-mercaptobenzimidazole with Et cyanoacetate. Compound II on reaction with substituted salicylaldehydes afforded 2-imino-N-(2-mercapto-1H-benzo[d]imidazol-5-yl)-2H-chromene-3-carboxamides III (R = H, OMe, Br, Cl, R’ = H; R = R’ =Br) in good yields. Compounds III (R = H, OMe, Br, Cl, R’ = H; R = R’ =Br) on condensation with formalin furnished the title compounds viz., 3-(2-mercapto-1H-benzo[d]imidazol-5-yl)-2H-chromeno[2,3-d]pyrimidin-4(3H)-ones I (R = H, OMe, Br, Cl, R’ = H; R = R’ =Br). All the synthesized compounds were screened for their anti-microbial and anti-oxidant activities.

Medicinal Chemistry Research published new progress about Antibacterial agents. 156089-67-7 belongs to class bromides-buliding-blocks, name is 4,5-Dibromo-2-hydroxybenzaldehyde, and the molecular formula is C7H4Br2O2, Quality Control of 156089-67-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gao, Guangpeng published the artcileEnantiomeric discrimination of α-hydroxy acids and N-Ts-α-amino acids by 1H NMR spectroscopy, Category: bromides-buliding-blocks, the main research area is hydroxy acid enantiomeric discrimination proton NMR spectroscopy; protected amino acid enantiomeric discrimination proton NMR spectroscopy; chiral solvating agent amino amido phenolic hydroxy group containing.

A new kind of chiral compounds with multiple amino, amido and phenolic hydroxy groups was synthesized from D-phenylalanine and D-phenylglycine, resp. The enantiomeric discriminations of α-hydroxy acids and N-Ts-α-amino acids were finished in the presence of the above chiral compounds as chiral solvating agents by 1H NMR spectroscopy. The chiral compounds are highly effective and practical chiral solvating agents towards α-hydroxy acids and N-Ts-α-amino acids.

Tetrahedron Letters published new progress about Amino acids, N-protected Role: ANT (Analyte), ANST (Analytical Study). 156089-67-7 belongs to class bromides-buliding-blocks, name is 4,5-Dibromo-2-hydroxybenzaldehyde, and the molecular formula is C7H4Br2O2, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Fu, Rugang published the artcileDirect Synthesis of 3-Coumaranones with Calcium Carbide as an Acetylene Source, HPLC of Formula: 156089-67-7, the main research area is salicylaldehyde calcium carbide one pot cycloaddition reaction; methyl vinylbenzofuranone preparation.

A synthesis method for the construction of 3-coumaranones from the reaction of two mols., calcium carbide and salicylaldehydes was reported. Various 2-methyl-2-vinylbenzofuran-3(2H)-ones was obtained in moderate yields in the absence of a metal catalyst. This involved widely available starting materials, an inexpensive and easy-to-handle alkyne source, and a cost-efficient route. The reaction mechanism was verified by d. functional theory calculations of possible intermediates and corresponding transition states.

Organic Letters published new progress about Cycloaddition reaction. 156089-67-7 belongs to class bromides-buliding-blocks, name is 4,5-Dibromo-2-hydroxybenzaldehyde, and the molecular formula is C7H4Br2O2, HPLC of Formula: 156089-67-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary