D-ring substituted rhazinilam analogues: semisynthesis and evaluation of antitubulin activity
摘要:
Novel (-)- and (+)-rhazinilam derivatives substituted on the D-ring (compounds 3, 4, 5 and 6) have been prepared from (+)-vincadifformine 7 and (-)-tabersonine and evaluated against the disassembly of microtubules into tubulin. Along with this study, a reproducible 'one pot' semisynthesis of (-)-rhazinilam 1 from (+)-1,2-didehydroaspidospermidine 2 was performed allowing the easy preparation of these new compounds. (C) 1999 Elsevier Science Ltd. All rights reserved.
Novel 15-nitro-2beta, 3beta-dihydro- and 15-nitro-2beta,3beta,6,7-tetrahydrotabersonine derivatives, pharmaceutical compositions containing them and process for preparing same
申请人:RICHTER GEDEON VEGYESZETI GYAR RT.
公开号:EP0491549B1
公开(公告)日:1996-03-27
US5204355A
申请人:——
公开号:US5204355A
公开(公告)日:1993-04-20
An Efficient Approach to <i>Aspidosperma </i>Alkaloids via [4 + 2] Cycloadditions of Aminosiloxydienes: Stereocontrolled Total Synthesis of (±)-Tabersonine. Gram-Scale Catalytic Asymmetric Syntheses of (+)-Tabersonine and (+)-16-Methoxytabersonine. Asymmetric Syntheses of (+)-Aspidospermidine and (−)-Quebrachamine
作者:Sergey A. Kozmin、Tetsuo Iwama、Yong Huang、Viresh H. Rawal
DOI:10.1021/ja017863s
日期:2002.5.1
readily adapted to the asymmetric synthesis of these compounds. The strategy is demonstrated by the total synthesis of (+/-)-tabersonine (rac-1), proceeding through a 12-step sequence. The basis for this approach was provided by a highly regio- and stereoselective [4 + 2] cycloaddition of 2-ethylacrolein with 1-amino-3-siloxydiene developed in our laboratory. Subsequent elaboration of the initial adduct
Novel (-)- and (+)-rhazinilam derivatives substituted on the D-ring (compounds 3, 4, 5 and 6) have been prepared from (+)-vincadifformine 7 and (-)-tabersonine and evaluated against the disassembly of microtubules into tubulin. Along with this study, a reproducible 'one pot' semisynthesis of (-)-rhazinilam 1 from (+)-1,2-didehydroaspidospermidine 2 was performed allowing the easy preparation of these new compounds. (C) 1999 Elsevier Science Ltd. All rights reserved.