A series of novel 7-deazapurine ribonucleosides bearing an alkyl, aryl, or lietaryl group in position 6 and H, F, or Cl atom in position 7 has been prepared either by Pd-catalyzed cross-coupling reactions of the corresponding protected 6-clilot-o-(7-h ilogeiiztted-)7-deiz ipurine ribonucleosides with alkyl- or (het)arylorganometallics followed by deprotection, or by single-step aqueous phase cross-coupling reactions of unprotected 6-chloro-(7-lialogen tted-)7-de iz tl)tii-iiie ri bon ucleos ides with (het)arylboronic acids. Significant cytostatic effect was detected With a Substantial proportion ofthe prepared compounds. The most potent were 7-H or 7-17 derivatives of 6-furyl- or 6-thienyl-7-deazapurines displaying cytostatic activity in multiple cancer cell lines with a geometric mean of 50% growth inhibition concentration ranging from 16 to 96 nM, a potency comparable to or better than that of the nucleoside analogue clofarabinc. lntr icel]Lll ll'pliosphoi-yl itioil to niono- and triphosphates and the inhibition of total RNA synthesis was denionstrated in preliminary study of metabolism and tinechanistin of action Studies.
NOVEL CYTOSTATIC 7-DEAZAPURINE NUCLEOSIDES
申请人:INSTITUTE OF ORGANIC CHEMISTRY AND BIOCHEMISTRY
OF THE ACADEMY OF SCIENCES OF THE CZECH REPUBLIC