<i>Cyclo</i>-saligenyl-5-fluoro-2′-deoxyuridinemonophosphate (<i>cyclo</i>Sal-FdUMP) — A New Prodrug Approach for FdUMP
作者:Martina Lorey、Chris Meier、Eric De Clercq、Jan Balzarini
DOI:10.1080/07328319708006177
日期:1997.7
The synthesis of cycloSal-FdUMP 3a-d as a new prodrug approach for FdU 1 is described. Phosphotriesters 3 release the FdUMP 2 selectively by a controlled, chemically induced tandem reaction in hydrolysis studies. The biological activity (IC50) of cycloSal-phosphotriesters 3 was evaluated in FM3A/O cells and FM3A/TK- cells.
A large number of cycloSal-nucleotide triesters 1-49 have been studied concerning their ability to inhibit cholinesterases of different origins as well as to inhibit HIV replication in cell culture. It was shown that none of the triesters showed inhibitory effects against human acetylcholinesterase (AChE; isolated enzyme) as well as against AChE from beef erythrocytes and calf serum. In contrast, inhibition of butyrylcholinesterase (BChE) has been observed for some triesters in human and mouse serum. cycloSal pronucleotides showed strong competitive inhibition with respect to the substrate acetylcholine chloride (K-i/K-m: similar to2 x 10(-5)) and acted by time-dependent irreversible inhibition of the human serum BChE. Detailed studies demonstrated that the inhibitory effect against BChE is dependent on the nucleoside analogue, the substitution pattern of the cycloSal-moiety, and particularly on the stereochemistry at the phosphorus atom. Structural requirements to avoid the inhibition of BChE by cycloSal-nucleotide triesters have been elucidated in the reported study.
Cyclic saligenyl phosphotriesters of 2′,3′-dideoxy-2′,3′-didehydrothymidine (d4T) — a new pro-nucleotide approach
作者:Chris Meier、Martina Lorey、E. De Clercq、Jan Balzarini
DOI:10.1016/s0960-894x(96)00597-5
日期:1997.1
The synthesis of a new pro-nucleotide approach for d4TMP 2 based on cycloSal-d4TMP 3a-d is described. Phosphotriesters 3 release d4TMP 2 selectively by a controlled, chemically induced tandem reaction. CycloSal-phosphotriesters 3 exhibited high biological activity against HIV-1/HIV-2 in CEM cells which was retained in CEM TK- cells. (C) 1997, Published by Elsevier Science Ltd.
<i>Cyclo</i>-saligenyl-2′,3′-dideoxy-2′,3′-didehydroythymidinemonophosphate (<i>cyclo</i>Sal-d4TMP) — A New Pro-Nucleotide Approach
作者:Chris Meier、Martina Lorey、Eric De Clercq、Jan Balzarini
DOI:10.1080/07328319708006176
日期:1997.7
The synthesis of cycloSal-d4TMP 3a-g as new pro-nucleotide approach for d4TMP 2 is described. Phosphotriesters 3 release the d4TMP 2 selectively by a controlled, chemically induced tandem reaction. CycloSal-phosphotriesters 3 exhibited high biological activity against HIV-1/HIV-2 in CEM cells which was completely retained in CEM TK- cells.