available β-bromo-α,β-unsaturated aldehydes of the general form 2 with 1-bromo-2-nitrobenzene (3, X=Br) delivers products, 4, that undergo reductive cyclization to novel quinolines (5) upon exposure to indium in aqueous ammonium chloride or to Raney-nickel in the presence of dihydrogen....
Palladium[0]-mediated Ullmann cross-coupling of 1-bromo-2-nitrobenzene (1 R = H) and its derivatives with a range of beta-halo-enals, -enones, or -esters readily affords the corresponding beta-aryl derivatives, which are converted into the corresponding quinolines, 2-quinolones, phenanthridine...
reduction, hydrogenationPalladium-catalyzed coupling of the 2-bromonitrobenzenes (I) with ethyl vinyl ether (II) gives mixtures of the ethoxystyrenes (III) - (V).doi:10.1002/chin.198821185KASAHARA, A.IZUMI, T.LIN, X.WILEY‐VCH Verlag GmbHChemInform...
In the present protocol, we report the synthesis and characterization of some novel azocompounds starting from 4-methoxyanniline and 4-aminophenazone, which were diazotised at low temperature. 4-nitrophenol, 2-aminobenzoic acid, benzamide, 4-aminobenzoic acid, resorcinol, obromonitrobenzene and 2-...
The addition of one equivalent of 2-nitrobenzenesulfenyl chloride to 1-(dimethoxymethyl)-2,3,5,6-tetramethylidene-7-oxabicyclo[2.2.1]heptane (4) is highly regioselective giving 2-(chloromethyl)-1-(dimethoxymethyl)-5,6-dimethylidene-3-[(2... DP Vogel - 《Tetrahedron》 被引量: 3发表: ...
1 KG 15天 会员价请登录 0 加入购物车 RH160499 8.40100.0025 默克密理博/Millipore 1,2-DICHLORO-3-NITROBENZENE FOR SYNTHESIS 25 G 15天 会员价请登录 0 加入购物车 RH160500 8.40101.0025 默克密理博/Millipore 2,3-DICHLOROBENZALDEHYDE FOR SYNTHESIS 25 G 15天 会员价请登录 0 加入购物车 RH16...
Carbazole, 1,4- dibromo-2-nitrobenzene, triisopropyl borate and 1,5-cyclooctadiene (1,5- COD) were purchased from Tokyo Chemical Industry. Celite 545 was available from Aldrich (St Louis, MO, USA). Potassium iodide, potassium iodate, N-bromosuccinimide (NBS), pyridine and phosphoric acid (H...
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A thorough study of the Utermohlen modification of the Skraup reaction (using 3-nitrobenzene-6-sulfonic acid as the acid catalyst, dehydrating agent, and oxidizing agent) was made with 3-Y–4-X-substituted anilines to study the ratio of 5,6- to 6,7-disubstituted products 〈89H(29)2345〉...
The first Suzuki coupling step used a phosphine-(ligand)-free palladium catalyst at room temperature and gave regio-selective coupling of (1) at the ortho-position to the nitro group. The bromo-biaryl product was then directly subjected in situ to a second coupling step, using different ...