Discovery of Highly Potent Pinanamine-Based Inhibitors against Amantadine- and Oseltamivir-Resistant Influenza A Viruses
作者:Xin Zhao、Runfeng Li、Yang Zhou、Mengjie Xiao、Chunlong Ma、Zhongjin Yang、Shaogao Zeng、Qiuling Du、Chunguang Yang、Haiming Jiang、Yanmei Hu、Kefeng Wang、Chris Ka Pun Mok、Ping Sun、Jianghong Dong、Wei Cui、Jun Wang、Yaoquan Tu、Zifeng Yang、Wenhui Hu
DOI:10.1021/acs.jmedchem.8b00042
日期:2018.6.28
Influenza pandemic is a constant major threat to public health caused by influenza A viruses (IAVs). IAVs are subcategorized by the surface proteins hemagglutinin (HA) and neuraminidase (NA), in which they are both essential targets for drug discovery. While it is of great concern that NA inhibitor oseltamivir resistant strains are frequently identified from human or avian influenzavirus, structural
流行性感冒是由甲型流感病毒(IAV)引起的对公共健康的持续重大威胁。IAVs按表面蛋白血凝素(HA)和神经氨酸酶(NA)进行分类,它们都是药物发现的基本靶标。尽管人们经常从人或禽流感病毒中鉴定出NA抑制剂奥司他韦耐药株,这一点引起了极大的关注,但流感HA的结构和功能表征却为新的抗病毒治疗带来了希望。在这项研究中,我们探索了基于频胺的抗病毒药物的构效关系(SAR),并发现了强效抑制剂M090对抗耐金刚烷胺的病毒(包括2009 H1N1大流行毒株)和耐奥司他韦的病毒。作用机理的研究,特别是溶血抑制作用,表明M090靶向HA流感,它占据了HA 2结构域的高度保守的口袋,并通过在构象重排过程中“锁定” HA 2的弯曲状态来抑制病毒介导的膜融合。这项工作在HA蛋白中提供了新的结合位点,表明该口袋可能是广谱抗A型流感药物设计和开发的有希望的目标。
A novel and direct synthesis of alkylated 2,2′-bithiophene derivatives using a combination of hypervalent iodine(<scp>iii</scp>) reagent and BF<sub>3</sub><b>·</b>Et<sub>2</sub>O
作者:Hirofumi Tohma、Minako Iwata、Tomohiro Maegawa、Yorito Kiyono、Akinobu Maruyama、Yasuyuki Kita
DOI:10.1039/b302462h
日期:——
A novel nonmetallic oxidative coupling of alkylthiophene derivatives leading to the corresponding 2,2â²-bithiophene derivatives using a combination of a hypervalent iodine(III) reagent, phenyliodine bis(trifluoroacetate)
(PIFA), and BF3·Et2O was developed.
Regiospecific Synthesis of 3-Alkylfurans and 3-Alkylthiophenes<i>via</i>Organoboranes
作者:Itaru Akimoto、Masahiro Sano、Akira Suzuki
DOI:10.1246/bcsj.54.1587
日期:1981.5
The reaction of bromine or iodine with ate-complexes obtained from trialkylboranes and 3-lithiofuran or 3-lithiothiophene gives the corresponding 3-alkylfurans or 3-alkylthiophenes in good yields, respectively.
[EN] FORMYLTHIOPHENES AND THEIR USE IN FLAVOR AND FRAGRANCE COMPOSITIONS<br/>[FR] FORMYLTHIOPHÈNES ET LEUR UTILISATION DANS DES COMPOSITIONS D'ARÔME ET DE PARFUM
申请人:INT FLAVORS & FRAGRANCES INC
公开号:WO2017079368A1
公开(公告)日:2017-05-11
The present invention is directed to novel organoleptic compounds, a process of augmenting, enhancing or imparting taste to a material selected from the group consisting of a foodstuff, a chewing gum, a dental product, an oral hygiene product and a medicinal product comprising the step of incorporating an olfactory acceptable amount of such novel organoleptic compounds, and a process of improving, enhancing or modifying a fragrance formulation through the addition of an olfactory acceptable amount of such novel organoleptic compounds.
Thallium(III) Trifluoroacetate−Trifluoroacetic Acid in the Chemistry of Polythiophenes. 2. Treatment of 3-Alkylthiophenes and Electron Paramagnetic Resonance Results
The treatment of thiophene and 3-alkylthiophenes with thallium(III) trifluoroacetate (TTFA) in trifluoroacetic acid (TFA) gives insoluble and dark powdery solids with oxygen content and electrical conductivities ranging from 10(-4) to 10(-6) Omega(-1) cm(-1). Polar and short fractions are negligible. All of them show semiconductivity (10(-3)-10(-6) Omega(-1) cm(-1)) when doped in iodine atmosphere. Electron paramagnetic resonance (EPR) spectra of either as-synthesized or I-2-treated solids display characteristic single and broad lines (Delta H-pp, 1.84-7.4 G) with Lorentzian shapes and g-values in the range 2.0028-2.0038. Infrared spectra show characteristic C-H out-of-plane deformations (780 cm(-1) for polythiophene and 820-825 cm(-1) for poly(3-alkylthiophenes)) in addition to a strong peak at 1650-1690 cm(-1) which has not been conclusively assigned. EPR spectra of some disubstituted and tetrasubstituted 2,2'-bithiophene radical cations have been observed and their g-values and coupling constants assigned when the corresponding parent compounds-are photolyzed with ultraviolet light in TFA. Photolysis of 3-alkylthiophenes in TFA in the EPR instrument gave the radical cations of 4,4'-dialkyl-2,2'-bithiophenes. In no case, were EPR signals of the isomeric 3,3'-dialkyl- or 3,4'-dialkyl-2,2'-bithiophene radical cations observed, indicating that dimerization of 3-alkylthiophenes occurs through the less sterically hindered 5-position. The presence of two doublet species corresponding to both conformers, syn and anti, in the radical cations is associated with a large barrier to rotation about the C(2)-C(2') bond.