39089-62-8Relevant articles and documents
Dual targeting of cholinesterase and amyloid beta with pyridinium/isoquinolium derivatives
Chakravarty, Harapriya,Ju, Yaojun,Chen, Wen-Hua,Tam, Kin Y.
, p. 242 - 255 (2019/12/27)
With the surge in the cases of Alzheimer's disease (AD) over the years, several targets have been explored to curb the disease. Cholinesterases, namely acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE), remain to be the available targets that are amendable to currently approved treatments. In this study, a series of novel compounds based on tramiprosate, a highly specific amyloid beta (Aβ) inhibitor, was designed to inhibit AChE, BuChE, and Aβ aggregation. In particular, the addition of a pyridinium/isoquinolinium ring to the tramiprosate moiety (to give compounds 3a–j) led to an increase in the binding affinity for the catalytic active site of cholinesterase, which was hampered by the presence of sulfonic acid. Exclusion of the sulfonic acid moiety led to a novel but effective class of cholinesterase inhibitors (9a–w). in vitro Aβ aggregation inhibition assay indicated that compounds 3a–j, 9e–f, 9i–l, 9q, 9r, 9u–w, and 12 could inhibit over 10% Aβ aggregation at 1 mM concentration. Cholinesterase inhibition assay suggested that compounds 9g, 9h, 9o, and 9q–t exhibit over 70% inhibition on both AChE and BuChE at a concentration of 100 μM. Amongst the designed molecules, compound 9r (ca 18% at 1 mM) showed comparable inhibitory effect on the inhibition of Aβ aggregation with tramiprosate (ca 20% at 1 mM), along with impressive cholinesterase inhibitory potential (AChE IC50 = 13 μM and BuChE IC50 = 12 μM), acceptable toxicity and ability to pass through blood brain barrier, which could be used to ameliorate the phenotypes of AD in preclinical models.
Synthesis and in vitro antimicrobial activity of benzo[b][1,4]thiazin-3(4H) -ones via smiles rearrangement
Yang, Hao,Fang, Liang,Li, Zhu-Bo,Ren, Fang-Kui,Wang, Li-Ying,Tian, Xiao,Shin, Dong-Soo,Zuo, Hua
experimental part, p. 93 - 100 (2012/02/16)
New benzo[b][1,4]thiazin-3(4H)-one derivatives (compounds 12a-p) were synthesized via Smiles rearrangement and assayed in vitro for their antimicrobial activity against Gram-positive, Gram-negative bacteria and fungi. The antimicrobial activity of the benzo[b][1,4]thiazin-3(4H)-ones showed, on the whole, potent toward all tested Gram-positive and Gram-negative microorganism (minimal inhibitory concentration ranging from 16 to 64 lg/ml), whereas weak effectiveness was exhibited against fungi. Data obtained suggested that 12g, 12i, and 12o exerted the best antibacterial activity against Gram-positive bacteria and compound 12b demonstrated the best inhibition of Gram-negative bacteria. These observations provide some predictions to design further antimicrobial active compounds prior to their synthesis following with molecular modeling studies. Springer Science+Business Media, LLC 2010.
NEW PYRIDOTHIENOPYRIMIDINE DERIVATIVES
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Page/Page column 43, (2008/06/13)
Use of a pyridothienopyrimidine derivative of formula (I), and the pharmaceutically acceptable salts and N-oxides thereof, wherein G1 represents a group selected from -CR6R7- or -NR6 being R6 and R7 independently selected from hydrogen atoms and C1-4 alkyl groups m and n are integers selected from 0 or 1 R1 and R2 are independently selected from hydrogen atoms and C1-4 alkyl groups R3 represents a group selected from alkyl, amino, monoalkylamino, dialkylamino, aryl, heteroaryl and saturated N-containing heterocyclyl groups bound through the nitrogen atom to the piridine ring, all of them being optionally substituted by one or more substituents selected from the group consisting of halogen atoms and alkyl, alkoxyalkyl, arylalkyl, R8OCO-, alkoxy, R8R9N-CO-, -CN, -CF3, -NR8R9, -SR8 and - SO2NH2 groups wherein R8 and R9 are independently selected from hydrogen atoms and C1-4alkyl groups R4 and R5 are independently selected from the group consisting of hydrogen atoms alkyl groups and groups of formula (II), wherein p and q are integers selected from 1, 2 and 3; A is either a direct bond or a group selected from -CONR14-, -NR14CO-, -O-, -COO-, -OCO-, -NR 14OCO-, - OCONR14-, -NR14CONR15-, -S-, -SO-, -SO2-, -COS- and -SCO-; and G2 is a group selected from aryl, heteroaryl or heterocyclyl; wherein the alkyl groups and the group G2 are optionally substituted by one or more substituents selected from group consisting of halogen atoms and alkyl, alkoxyalkyl, arylalkyl, R16OCO-, hydroxy, alkoxy, oxo, R16R17NCO-, -CN, -CF3, -NR16R17,-SR16 and -SO2NH2 groups; wherein R10 to R17 are independently selected from hydrogen atoms and C1-4 alkyl groups; in the manufacture of a medicament for the treatment or prevention of a pathological condition or disease susceptible to amelioration by inhibition of phosphodiesterase 4.
