Synthesis of (±)-camptothecin using a [3+2] nitrone cycloaddition to construct the CDE ring moiety
作者:Jurong Yu、Jeffrey DePue、David Kronenthal
DOI:10.1016/j.tetlet.2004.08.025
日期:2004.9
A novel synthesis to camptothecin is described. A Friedlander condensation of o-aminobenzaldehye 2 with tricylclic ketone 3 affords camptothecin after further elaboration. Tricyclic ketone 3 is prepared via a route employing a [3+2] nitrone cyclo-addition and an intramolecular Knoevenagel condensation. (C) 2004 Elsevier Ltd. All rights reserved.
HERTZBERG, ROBERT P.;CARANFA, MARY JO.;HOLDEN, KENNETH G.;JAKAS, DALIA R.+, J. MED. CHEM., 32,(1989) N, C. 715-720
作者:HERTZBERG, ROBERT P.、CARANFA, MARY JO.、HOLDEN, KENNETH G.、JAKAS, DALIA R.+
DOI:——
日期:——
Modification of the hydroxylactone ring of camptothecin: inhibition of mammalian topoisomerase I and biological activity
作者:Robert P. Hertzberg、Mary Jo Caranfa、Kenneth G. Holden、Dalia R. Jakas、Gregory Gallagher、Michael R. Mattern、Shau Ming Mong、Joan O'Leary Bartus、Randall K. Johnson、William D. Kingsbury
DOI:10.1021/jm00123a038
日期:1989.3
Several camptothecin derivatives containing a modified hydroxy lactonering have been synthesized and evaluated for inhibition of topoisomerase I and cytotoxicity to mammalian cells. Each of the groups of the hydroxy lactone moiety, the carbonyl oxygen, the ringlactone oxygen, and the 20-hydroxy group, were shown to be critical for enzyme inhibition. For example the lactol, lactam, thiolactone, and