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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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