The syntheses of rebeccamycin analogues possessing a 7-azaindole moiety instead of an indole unit, and with both indole and azaindole moieties linked to the carbohydrate are described. In these bridged aza compounds, the oxygen of the pyranose heterocycle is oriented towards either the indole, or the azaindole unit. In these series, compounds bearing a free imide nitrogen were synthesized by coupling the corresponding aglycones with a sugar pre-tosylated in 2-position via a Mitsunobu reaction. To obtain a precursor for bridged aza-rebeccamycin analogues substituted in 6-position on the sugar moiety, a 2,6-ditosylated sugar was used. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of 7-azaindolocarbazoles
In the course of a program aimed at designing antitumor agents containing an indolocarbazole framework, an efficient synthetic scheme based on the use of 3,4-dibromo-N-methylmaleimide and 7-azaindole has been developed to elaborate a series of mono- and di-aza derivatives of arcyriaflavin. The procedure was further exploited to introduce a hydroxyl group at different positions on the indole moiety of the non-symmetrical compounds. The DNA binding capacity and cytotoxic potential of these 7-azaindolocarbazole derivatives was evaluated. (C) 2002 Elsevier Science Ltd. All rights reserved.
First synthesis of symmetrical and non-symmetrical aza indolocarbazoles derivatives
作者:Sylvain Routier、Gérard Coudert、Jean-Yves Mérour、Daniel Henri Caignard
DOI:10.1016/s0040-4039(02)00315-5
日期:2002.4
A new family of aza-indolocarbazoles 2-3 was built from protected 3-(3-indolyl)-4-bromo-N-methylmaleimide in a few efficient steps. Symmetrical and non-symmetrical products were obtained. Regioselectivity of anionic condensation was controlled. A possible selective deprotection between an N-Boc and N-benzenesulphonyl group using mild basic conditions was confirmed. (C) 2002 Elsevier Science Ltd. All rights reserved.