Synthesis of a bioprobe for elucidation of target molecule of spongean anti-malarial peroxides
摘要:
The reactants of an anti-malarial peroxide having a 6-carbomethoxymethyl-3-methoxy-1,2-dioxane moiety treated with FeSO4 were analyzed. For mechanistic study of the anti-malarial peroxide, two biotinylated probes to elucidate the target molecules were designed and synthesized. The two synthesized probes showed potent anti-malarial activity, and one of them was proved to form an irreversible binding with protein in a model experiment. (C) 2004 Elsevier Ltd. All rights reserved.
Tandem intramolecular Michael addition and 1,3-dipolar cycloaddition reactions of oximes; versatile new carbon–carbon bond forming methodology
作者:Paul Armstrong、Ronald Grigg、Sivagnanasundram Surendrakumar、William J. Warnock
DOI:10.1039/c39870001327
日期:——
Oximes undergo intramolecular Michael addition to proximate electronegative alkenes, generating cyclic nitrones which can be trapped inter- and intra-molecularly in 1,3-dipolar cycloadditionreactions taking place either separately or in tandem.
Application of the intramolecular azomethine imine cycloaddition to the construction of a novel, orthogonally protected spirodiamino acid scaffold
作者:Roland E Dolle、Michael C Barden、Paul E Brennan、Gulzar Ahmed、Vinh Tran、Douglas M Ho
DOI:10.1016/s0040-4039(99)00391-3
日期:1999.4
Hydrazone 4 undergoes tandem intramolecular Michael addition — intramolecular azomethine iminecycloaddition in ethanol at reflux to furnish the tricyclic pyrazoline methyl ester 3 in 75% yield. A five-step conversion of 3 to N1-Alloc-6-(N-Boc-aminomethyl)-1-azaspiro[4.4]nonane-2-acetic acid 1 provides access to a unique tri-functionalized scaffold for combinatorial chemistry.
In order to study the structure-activity relationship of anti-malarial spongean peroxides, several analogues concerning with the 6-methoxyacetyl moiety and the 3-pentyl residue in methyl 2-(3-methoxy-3-pentyl-1,2-dioxan-6-yl) acetate were synthesized and evaluated for anti-malarial activity. The tert-butyl ester analogue 14 showed stability in mouse serum and a high selectivity index against the malaria parasite, Plasmodium falciparum, and the citronellyl analogue 31 exhibited the strongest in vitro antimalarial activity among them, and the imidazole analogue 25 showed desirable in vivo anti-malarial activity against P. berghei infected mice. (C) 2004 Elsevier Ltd. All rights reserved.
ARMSTRONG, PAUL;GRIGG, RONALD;SURENDRAKUMAR, SIVAGNANASUNDRAM;WARNOCK, WI+, J. CHEM. SOC. CHEM. COMMUN.,(1987) N 17, 1327-1328
The reactants of an anti-malarial peroxide having a 6-carbomethoxymethyl-3-methoxy-1,2-dioxane moiety treated with FeSO4 were analyzed. For mechanistic study of the anti-malarial peroxide, two biotinylated probes to elucidate the target molecules were designed and synthesized. The two synthesized probes showed potent anti-malarial activity, and one of them was proved to form an irreversible binding with protein in a model experiment. (C) 2004 Elsevier Ltd. All rights reserved.