专利号:US-5321140-A 优先权日:1990-12-20 标 题 :Pyridinecarboxaldehyde D-ring intermediates useful for the synthesis of camptothecin and camptothecin analogs 发明人:COMINS DANIEL L; BAEVSKY MATTHEW F 权利人:UNIV NORTH CAROLINA STATE 摘要:Compounds of Formula I ##STR1## are made in accordance with the following scheme: ##STR2## wherein R may be loweralkyl; R 1 may be H, loweralkyl, loweralkoxy, or halo; R 2 , R 3 , R 4 , and R 5 may each independently be H, amino, hydroxy, loweralkyl, loweralkoxy, loweralkylthio, di(loweralkyl)amino, cyano, methylenedioxy, formyl, nitro, halo, trifluoromethyl, aminomethyl, azido, amido, hydrazino, or any of the twenty standard amino acids bonded to the A ring via the amino-nitrogen atom; Y is H and W and X are halogen. Also disclosed are novel processes for making starting materials for the scheme given above, and novel intermediates employed in these processes.
专利号:WO-9325556-A1 优先权日:1992-06-18 标 题:Methods and intermediates for the asymmetric synthesis of camptothecin and camptothecin analogs
专利号:DE-69330496-T2 优先权日:1992-06-18 标题:METHOD AND INTERMEDIATE PRODUCTS FOR THE ASYMMETRICAL SYNTHESIS OF CAMPTOTHECIN AND CAMPTOTHECIN ANALOGS
专利号:JP-3499554-B2 优先权日:1992-06-18 标题:Methods and intermediates for asymmetric synthesis of camptothecin and camptothecin analogs
专利号:JP-H07507795-A 优先权日:1992-06-18 标 题 :Methods and intermediates for asymmetric synthesis of camptothecin and camptothecin analogs
专利号:EP-0646117-B1 优先权日:1992-06-18 标题:Methods and intermediates for the asymmetric synthesis of camptothecin and camptothecin analogs
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