Novel potent pyridoxine-based inhibitors of AChE and BChE, structural analogs of pyridostigmine, with improved in vivo safety profile
作者:Alexey D. Strelnik、Alexey S. Petukhov、Irina V. Zueva、Vladimir V. Zobov、Konstantin A. Petrov、Evgeny E. Nikolsky、Konstantin V. Balakin、Sergey O. Bachurin、Yurii G. Shtyrlin
DOI:10.1016/j.bmcl.2016.06.070
日期:2016.8
We report a novel class of carbamate-type ChE inhibitors, structural analogs of pyridostigmine. A small library of congeneric pyridoxine-based compounds was designed, synthesized and evaluated for AChE and BChE enzymes inhibition in vitro. The most active compounds have potent enzyme inhibiting activity with IC50 values in the range of 0.46-2.1 mu M ( for AChE) and 0.59-8.1 mu M (for BChE), with moderate selectivity for AChE comparable with that of pyridostigmine and neostigmine. Acute toxicity studies using mice models demonstrated excellent safety profile of the obtained compounds with LD50 in the range of 22-326 mg/kg, while pyridostigmine and neostigmine are much more toxic (LD50 3.3 and 0.51 mg/kg, respectively). The obtained results pave the way to design of novel potent and safe cholinesterase inhibitors for symptomatic treatment of neuromuscular disorders. (C) 2016 Elsevier Ltd. All rights reserved.
Bis-phosphonium salts of pyridoxine: The relationship between structure and antibacterial activity
作者:Mikhail V. Pugachev、Nikita V. Shtyrlin、Sergey V. Sapozhnikov、Lubov P. Sysoeva、Alfiya G. Iksanova、Elena V. Nikitina、Rashid Z. Musin、Olga A. Lodochnikova、Eugeny A. Berdnikov、Yurii G. Shtyrlin
DOI:10.1016/j.bmc.2013.09.056
日期:2013.12
A series of 23 novel bis-phosphonium salts based on pyridoxine were synthesized and their antibacterial activities were evaluated in vitro. All compounds were inactive against gram-negative bacteria and exhibited the structure-dependent activity against gram-positive bacteria. The antibacterial activity enhanced with the increase in chain length at acetal carbon atom in the order n-Pr > Et > Me. Further
合成了一系列基于吡ido醇的23种新型双salts盐,并对其体外抗菌活性进行了评估。所有化合物对革兰氏阴性菌均无活性,并且对革兰氏阳性菌表现出结构依赖性活性。随着乙缩醛碳原子上链长的增加,抗菌活性增强,顺序为n -Pr> Et> Me。烷基链的长度和支链的进一步增加导致抗菌活性降低。5,6-双(三苯基膦基(甲基)-2,2,2,8-三甲基-4 H- [1,3]-二氧[4,5- c ]吡啶二氯化物(化合物1)与正丁基,m-甲苯基或对甲苯基以及含溴化物的化合物1中的氯阴离子(化合物14a)将其对金黄色葡萄球菌和表皮葡萄球菌的活性提高了5倍(MIC = 1–1.25μg/ ml)。但实际上在所有情况下,化合物1的化学修饰都导致其对HEK-293细胞的毒性增加。唯一的例外是化合物5,6-双[三丁基膦基(甲基)]-2,2,8-三甲基-4 H- [1,3]二氧杂[4,5- c ]吡啶二氯化物(10a),
Crystal structure of seven-membered acetals with furan and pyridine planar fragments
X-ray structure investigation of fused seven-membered acetals based on vitamin B6 and 3,4-bis(hydroximethyl)furan have been performed. Molecules adopt chair conformations with equatorial position of substituents at acetal carbons; the geometry of acetal cycles resembles that of related seven-membered phthalylacetals. Stereochemistry of the tetracyclic adduct of furan-containing acetal with maleic anhydride
摘要 对基于维生素 B6 和 3,4-双(羟甲基)呋喃的稠合七元缩醛进行了 X 射线结构研究。分子采用椅子构象,缩醛碳上的取代基位于赤道位置;缩醛循环的几何形状类似于相关的七元邻苯二甲缩醛。还研究了含呋喃缩醛与马来酸酐的四环加合物的立体化学。该产品呈现出具有明显扭曲的七元椅子状构象的内-外构型。