Synthesis and DNA-sequence selectivity of a series of mono- and difunctional 9-aminoacridine nitrogen mustards
摘要:
The aim of this work was to identify nitrogen mustards that would react selectively with DNA, particularly in G-rich regions. A sei ies of mono- and difunctional nitrogen mustards was synthesized in which the (2-chloroethyl)amino functions were connected to the N-9 of 9-aminoacridine by way of a spacer chain consisting of two to six methylene units. The length of the spacer chain connecting the alkylating and putative DNA-intercalating groups was found to affect the preference for the alkylation of different guanine-N-7 positions in a DNA sequence. All of the compounds reacted preferentially at G's that are followed by G as do most other types of nitrogen mustards, but the degree of selectivity was greater. The compounds reacted at much lower concentrations than were required for comparable reaction by mechlorethamine (HN2), consistent with initial noncovalent binding to DNA prior to guanine-N-7 alkylation. The degree of DNA-sequence selectivity increased as the spacer-chain length decreased below four methylene units. Most strikingly, long spacer compounds reacted strongly at 5'-GT-3' sequences, Whereas this reaction was almost completely suppressed when-the spacer length was reduced to two or three methylenes. Mono- and difunctional compounds of a given spacer length showed no consistent difference in DNA-sequence preference.
Synthesis and DNA-sequence selectivity of a series of mono- and difunctional 9-aminoacridine nitrogen mustards
摘要:
The aim of this work was to identify nitrogen mustards that would react selectively with DNA, particularly in G-rich regions. A sei ies of mono- and difunctional nitrogen mustards was synthesized in which the (2-chloroethyl)amino functions were connected to the N-9 of 9-aminoacridine by way of a spacer chain consisting of two to six methylene units. The length of the spacer chain connecting the alkylating and putative DNA-intercalating groups was found to affect the preference for the alkylation of different guanine-N-7 positions in a DNA sequence. All of the compounds reacted preferentially at G's that are followed by G as do most other types of nitrogen mustards, but the degree of selectivity was greater. The compounds reacted at much lower concentrations than were required for comparable reaction by mechlorethamine (HN2), consistent with initial noncovalent binding to DNA prior to guanine-N-7 alkylation. The degree of DNA-sequence selectivity increased as the spacer-chain length decreased below four methylene units. Most strikingly, long spacer compounds reacted strongly at 5'-GT-3' sequences, Whereas this reaction was almost completely suppressed when-the spacer length was reduced to two or three methylenes. Mono- and difunctional compounds of a given spacer length showed no consistent difference in DNA-sequence preference.
(3-oxo)pyridazin-4-ylurea derivatives as PDE4 inhibitors
申请人:Almirall, S.A.
公开号:EP2196465A1
公开(公告)日:2010-06-16
New (3-oxo)pyridazin-4-ylurea derivatives having the chemcial structure of formula (I) are disclosed; as well as process for their preparation, pharmaceutical compositions comprising them and their use in therapy as inhibitors of the phosphodiesterase IV (PDE4).
Dubravkova et al., Chemicke Zvesti, 1958, vol. 12, p. 252,254
作者:Dubravkova et al.
DOI:——
日期:——
[EN] (3-OXO)PYRIDIN-4-YLUREA DERIVATIVES AS PDE4 INHIBITORS<br/>[FR] DÉRIVÉS DE (3-OXO)PYRIDIN-4-YLURÉE EN TANT QU'INHIBITEURS DE LA PDE4
申请人:ALMIRALL SA
公开号:WO2010069504A1
公开(公告)日:2010-06-24
New (3-oxo)pyridazin-4-ylurea derivatives having the chemcial structure of formula (I) are disclosed; as well as process for their preparation, pharmaceutical compositions comprising them and their use in therapy as inhibitors of the phosphodiesterase IV (PDE4).
Synthesis and DNA-sequence selectivity of a series of mono- and difunctional 9-aminoacridine nitrogen mustards
作者:Kurt W. Kohn、Ann Orr、Patrick M. O'Connor、Lynn James Guziec、Frank S. Guziec
DOI:10.1021/jm00027a008
日期:1994.1
The aim of this work was to identify nitrogen mustards that would react selectively with DNA, particularly in G-rich regions. A sei ies of mono- and difunctional nitrogen mustards was synthesized in which the (2-chloroethyl)amino functions were connected to the N-9 of 9-aminoacridine by way of a spacer chain consisting of two to six methylene units. The length of the spacer chain connecting the alkylating and putative DNA-intercalating groups was found to affect the preference for the alkylation of different guanine-N-7 positions in a DNA sequence. All of the compounds reacted preferentially at G's that are followed by G as do most other types of nitrogen mustards, but the degree of selectivity was greater. The compounds reacted at much lower concentrations than were required for comparable reaction by mechlorethamine (HN2), consistent with initial noncovalent binding to DNA prior to guanine-N-7 alkylation. The degree of DNA-sequence selectivity increased as the spacer-chain length decreased below four methylene units. Most strikingly, long spacer compounds reacted strongly at 5'-GT-3' sequences, Whereas this reaction was almost completely suppressed when-the spacer length was reduced to two or three methylenes. Mono- and difunctional compounds of a given spacer length showed no consistent difference in DNA-sequence preference.