US 6,982,333 B2
Intermediates in the synthesis of camptothecin and related compounds and synthesis thereof
Dennis P. Curran, Pittsburgh, Pa. (US); Hubert Josien, Hoboken, N.J. (US); and Sung Bo Ko, Taejon (Korea, Republic of)
Assigned to University of Pittsburgh, Pittsburgh, Pa. (US)
Filed on Sep. 16, 2003, as Appl. No. 10/663,605.
Application 10/663605 is a division of application No. 09/815459, filed on Mar. 23, 2001, granted, now 6,620,937.
Application 09/815459 is a division of application No. 09/007872, filed on Jan. 15, 1998, granted, now 6,211,371.
Application 09/007872 is a continuation of application No. 08/436799, filed on May 05, 1995, abandoned.
Application 08/436799 is a continuation in part of application No. 08/085190, filed on Jun. 30, 1993, abandoned.
Prior Publication US 2004/0063947 A1, Apr. 01, 2004
Int. Cl. C07F 7/02 (2006.01); C07F 7/10 (2006.01)
U.S. Cl. 546—14 2 Claims
 
1. A chemical compound having the formula
OG Complex Work Unit Drawing
wherein R9 is a normal alkyl group or a branched alkyl group and wherein R10 is —CHO or —CH2OCH2CH═CHR11, wherein R11 is an alkyl group, a vinyl group, an ethynyl group or a phenyl group, wherein R12, R13 and R14 are independently an alkyl group or an aryl group, and wherein X is I or Br.