Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-10-24
2006-10-24
Davis, Brian J. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
07126000
ABSTRACT:
The present invention is to prepare efficiently 2′-amino-5′-hydroxypropiophenone corresponding to the AB-ring part of camptothecin (CPT) skeleton and a tricyclic ketone corresponding to the CDE-ring part in order to provide efficiently CPT by the total synthesis, which is a starting material for irinotecan hydrochloride and various kinds of camptothecin derivatives, and to provide stably CPT and its derivatives.
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Henegar, Kevin E., et al., “Practical Asymmetric Synthesis of (S)-4-Ethyl-7,8-dihydro-4-hydroxy-1H-pyranol[3,4-f]indolizine-3,6,10(4H)-trione, a Key Intermediate for the Synthesis of Irinotecan and Other Camptothecin Analogs,” J. Org. Chem., 1997, vol. 62, No. 19, pp. 6588 to 6597.
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Nishiyama Hiroyuki
Ogawa Takanori
Sawada Seigo
Uchida Miyuki
Davis Brian J.
Kabushiki Kaisha Yakul't Honsha
Wolf Greenfield & Sacks P.C.
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