Design, synthesis and structure–activity relationships of a series of 9-substituted adenine derivatives as selective phosphodiesterase type-4 inhibitors
Adenine derivatives substituted in position 9 have been demonstrated to have potent cyclic nucleotide phosphodiesterase (PDE) inhibition properties with high selectivity toward PDE-4. Starting from our initial lead compound 9-(2-fluorobenzyl)-N(6)-methyl-2-trifluoromethyladenine (4, NCS613), we designed and synthesized a new series of 9-substituted derivatives for developing structure-activity relationship
This communication describes the synthesis, structural investigation and tubulin binding of purine rare imino tautomer based Ag(i) and Hg(ii)–carbene complexes. These complexes exhibit cytotoxicity through tubulin interaction by binding to a site close to the GTP binding site.
Crystal engineering with a purine rare tautomer: structures and luminescence properties
作者:Shruti Khanna、Sandeep Verma
DOI:10.1039/c4ce00611a
日期:——
living systems through unfavorable interactions with biomolecules, interacts with purine nucleobases through N7 imino nitrogen and induces modifications by altering amino–imino tautomeric equilibrium. Herein, we report unique crystallographic signatures of cadmium complexes of N9-benzyl-N6-methoxyadenine, a rare imino tautomer of adenine. These complexes exhibit a variety of coordination numbers and spatial
Crystallographic Signatures of <i>N</i><sup>6</sup>-Methoxyadenine Imino Tautomer–Silver Complexes
作者:Shruti Khanna、Sandeep Verma
DOI:10.1021/cg300231r
日期:2012.6.6
Detailed crystallographic analysis of four silver complexes of N9-benzyl-N-6-methoxyadenine, 1, on the basis of three different counteranions and silver ion stoichiometry, is discussed in this article. 1 is a rare tautomer of adenine, which exhibits promutagenic behavior as it partly mimics hydrogen bond donor and acceptor properties of guanine and mispairs with cytosine. Complexes 2 and 4 exhibit discrete Ag2L2 dimer, while complex 3 shows two AgL2 units in addition to a Ag2L2 dimer, all in a head-to tail fashion. Complex 5, on the other hand, shows four AgL2 units coordinated in a head-to-head fashion affording a three-dimensional lattice stabilized by CH center dot center dot center dot F interactions. Various noncovalent interactions such as hydrogen bonding, CH-pi interactions, argentophilic interactions, and Ag-pi interactions stabilize these complexes.
FUJII, TOZO;SAITO, TOHRU;ITAYA, TAISUKE;KIZU, KYOKO;KUMAZAWA, YUKINARI;NA+, CHEM. AND PHARM. BULL., 35,(1987) N 11, 4482-4493