Antitumor Polycyclic Acridines. 8. Synthesis and Telomerase-Inhibitory Activity of Methylated Pentacyclic Acridinium Salts
摘要:
Two short routes to novel methylated pentacyclic quinoacridinium salts have been devised. New compounds display telomerase-inhibitory potency (<1 muM) in the TRAP assay. 3,11-Difluoro-6,8,13-trimethyl-8H-quino[4,3,2-kl]acridinium methosulfate (12d, RHPS4, NSC 714187) has a higher selectivity for triplex and quadruplex DNA structures than the 3,6,8,11,13-pentamethyl analogue (12c, RHPS3, NSC 714186) and a low overall growth-inhibitory activity in the NCI 60 cell panel (mean GI(50) 13.18 muM); in addition, the activity profile of 12d does not COMPARE with agents of the topoisomerase II class. Compound 12d is soluble in water, stable in the pH range of 5-9, efficiently transported into tumor cells, and is currently the lead structure for further elaboration in this new class of telomerase inhibitor.
The present invention relates to novel compounds of formula (I) wherein X, Q, R1, R2, R3, R4, R5, R6, R7, R8, R21, R22 and R23 are as defined herein. The compounds of formula (I) are inhibitors of telomerase enzyme function and are accordingly useful for the treatment cellular proliferation disorders, such as cancer.
Synthesis and properties of bioactive 2- and 3-amino-8-methyl-8H-quino[4,3,2-kl]acridine and 8,13-dimethyl-8H-quino[4,3,2-kl]acridinium saltsPart 15 in the series: Antitumour polycyclic acridines. See ref. 1. for part 14.
作者:Ian Hutchinson、Andrew J. McCarroll、Robert A. Heald、Malcolm F. G. Stevens
DOI:10.1039/b310796p
日期:——
Cyclisation of 9-(benzotriazol-1-yl)acridine 1 to the pentacycle 8H-quino[4,3,2-kl]acridine 5 in a range of low-boiling solvents is mechanistically distinct from previously published photochemical (carbene) and thermolytic (radical) cyclisations. Fragmentation of the triazole ring of 1 to a diazonium intermediate 7, and its subsequent heterolysis (–N2) and cyclisation is facilitated by solvation of intermediate zwitterionic species. Derivatives of 2- and 3-aminoquinoacridines methylated in the 8-position can be converted to 8,13-dimethylquino[4,3,2-kl]acridinium iodide salts with methyl iodide and were required for biological examination as potential telomerase inhibitors. The chloro group in 3-chloro-8-methyl-8H-quino[4,3,2-kl]acridine can be replaced efficiently by benzylamino, 4-morpholinyl and cyano substituents in palladium(0) mediated reactions.
The present invention relates to novel acridine derivatives of formula (I), or pharmaceutically acceptable salts thereof, which are inhibitors of the telomerase enzyme function. These compounds are useful for the treatment cellular proliferation disorders, such as cancer.
N8, n13 -disubstituted quino[4,3,2-kl]acridinium salts as therapeutic agents
申请人:——
公开号:US20040063739A1
公开(公告)日:2004-04-01
The present invention pertains to certain N
8
,N
13
-disubstituted quino[4,3,2-kl]acridinium salts of formula (Q
−
) which inhibit telomerase wherein: p is an integer from 0 to 4; q is an integer from 0 to 3; r is an integer from 0 to 4; each R
A
is —H or a ring substituent; each R
B
is —H or a ring substituent; each R
C
is —H or a ring substituent; R
N8
is a nitrogen substituent; R
N13
is a nitrogen substituent; and, Q is an anion. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both in vitro and in vivo, to inhibit telomerase, to regulate cell proliferation, and in the treatment of proliferative conditions, such as cancer.
Antitumour polycyclic acridines. Part 10.1 Synthesis of penta- and hexa-cyclic heteroaromatic systems by radical cyclisations of substituted 9-anilinoacridines
作者:Michael J. Ellis、Malcolm F. G. Stevens
DOI:10.1039/b106327h
日期:2001.11.29
9-Anilinoacridines substituted with a bromine atom in the 2-position of the anilino group or the 1-position of the acridine moiety can be cyclised with tributyltin hydride–AIBN to penta- or hexacyclic acridines. Of the polycyclic systems 13,14-dihydropyrrolo[3′,2′,1′:8,1]quino[4,3,2-kl]acridine 14a is the most potent cytotoxic agent displaying a mean GI50 concentration against a panel of 60 human tumour