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Michiharu Sugiura Natsuyo YamaguchiKoosuke Asai Isamu Maeba 《Tetrahedron letters》2003,44(33):6241-6243
Diphenyl 1-phenoxycarbonyl-1,4-dihydroquinoline-4-phosphonates 5c-g, obtained from the reaction of corresponding quinoline derivatives 1 with phenyl chloroformate and triphenyl phosphite in one step, were ozonized in CHCl3 and CH3COOH. Treatment of the resulting mixture with NaHCO3 produced the 3-formyl-1-phenoxycarbonylindole derivatives 8a-e in high yields. The ring transformation of quinolines 1 to indoles 8 proceeds under mild conditions. 相似文献
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Elham Kanaani 《合成通讯》2017,47(14):1326-1331
A series of novel dihydroquinoline derivatives were synthesized using malononitrile, 2-aminobenzoic acid, and benzaldehydes in the presence of a catalytic amount of acetic acid, without the use of any additional cocatalyst, under solvent-free conditions. The reaction is characterized by high efficiency, easy workup, simple purification of the products, and availability of catalyst. 相似文献
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The efficiency of formation and the decay kinetics of carbocations formed under the photolysis of 1,2,2,4-tetramethyl-1,2-dihydroquinoline
in methanol and in a porous glass filled with methanol or dried in air or in vacuo were studied by the laser flash photolysis techniques. In MeOH, the carbocations recombine via the second-order law in the reaction with the MeO− anion formed in an equimolar amount and decay via the first-order law in the reaction with the solvent with rate constants of 3·108 L mol−1 s− 1 and 1.4·103 s−1, respectively. When the solution is placed into the porous glass, no recombination of the carbocations with MeO− is observed, and the reaction with the solvent is somewhat inhibited (rate constant 8·102 s−1). More than tenfold inhibition of the reaction of the carbocations with methanol is observed on going to a monolayer of MeOH
on the surface. The main route of carbocation decay in the porous glass dried in vacuo is the geminate recombination with the SiO groups. The corresponding kinetics is described in terms of the model of freely
diffusing reactants.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2239–2243, October, 2005. 相似文献
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