Photoexcited Proton Transfer from Enhanced Photoacids
摘要:
Naphthols with electron-withdrawing groups such as cyano or methanesulfonyl at C-5 and C-8 exhibit greatly enhanced photoacidity. This increase in photoacidity enables the substituted naphthols to undergo excited-state proton transfer (ESPT) in alcohols and Me(2)SO in the absence of water. In aqueous tetrahydrofuran solution, efficient proton transfer to water occurs at much lower water concentrations than with the parent naphthol, and the kinetics of proton transfer indicate that a smaller water cluster is involved.
[EN] SPIRO-COMPOUNDS AS S1P MODULATORS<br/>[FR] COMPOSÉS SPIRO EN TANT QUE MODULATEURS DE S1P
申请人:ABBVIE DEUTSCHLAND
公开号:WO2018083171A1
公开(公告)日:2018-05-11
The invention relates to heterocyclic compounds of formula (I) as SIP modulators, pharmaceutical compositions comprising such compounds, and uses thereof in the treatment or alleviation of diseases or disorders mediated by an SIP receptor.
A Synthesis of Two Novel Benzo[<i>f</i>]ninhydrin Analogs: 6-Methoxybenzo[<i>f</i>]ninhydrin and Thieno[<i>f</i>]ninhydrin
作者:Robert J. Heffner、Madeleine M. Joullié
DOI:10.1080/00397919108019795
日期:1991.4
Abstract Improved methodology for the synthesis of benzo[f]ninhydrin (1) is described. The generality of this approach is illustrated with the synthesis of two novelanalogs, 6-methoxybenzo[f]ninhydrin (3) and thieno[f]ninhydrin (4).
reduced to 4,5,6,7-tetrahydro-2H-isoindoles. Isoindole 24 was also reduced to a mixture of an isoindoline and a 4,5,6,7-tetrahydro-2H-isoindole. In contrast, 2,3-dihydro-1H-indoles 21 underwent dehydrogenation to give thermodynamically stable indoles. Theoretical calculations show the significant difference in aromaticity between isoindoles and indoles, corresponding to the observed differences in reactivities
Inhibition of coronavirus (CoV)‐encoded papain‐like cysteine proteases (PLpro) represents an attractive strategy to treat infections by these important human pathogens. Herein we report on structure‐activity relationships (SAR) of the noncovalent active‐site directed inhibitor (R)‐5‐amino‐2‐methyl‐N‐(1‐(naphthalen‐1‐yl)ethyl) benzamide (2 b), which is known to bind into the S3 and S4 pockets of the
抑制冠状病毒(CoV)编码的木瓜蛋白酶样半胱氨酸蛋白酶(PL pro )是治疗这些重要人类病原体感染的一种有吸引力的策略。在此,我们报告了非共价活性位点定向抑制剂 ( R )-5-氨基-2-甲基-N-(1-(萘-1-基)乙基)苯甲酰胺的构效关系 (SAR) ( 2 b ) ,已知它会结合到 SARS-CoV PL pro的 S3 和 S4 口袋中。此外,我们报告发现异吲哚啉是一类新的有效 PL前体抑制剂。这些研究还提供了对该抑制剂类的结合模式的更深入的了解。重要的是,这些抑制剂还被证实能够抑制细胞培养中的 SARS-CoV-2 复制,这表明,由于目标蛋白酶的结构高度相似,针对 SARS-CoV PL pro鉴定的抑制剂是开发新的泛型抑制剂的宝贵起点。 ‐冠状病毒抑制剂。
Preparation of Tetrabenzo[4.4.2]undecastarphene by On‐Surface Synthesis
A large dissymmetric starphene molecule, the tetrabenzo[a,c,u,w]naphtho[2,3-l]nonaphene, was obtained by first preparing a soluble precursor which was then sublimated on a Au(111) surface in an ultra-high vacuum. In a second step, controlled annealings from 200 °C to 275 °C initiated two successive cyclodehydrogenation steps with the formation of 3 new carbon-carbon bonds. A second conformer was also
通过首先制备可溶性前体,然后将其升华到 Au(111) 表面上,获得了一个大的不对称星形苯分子,四苯并 [ a , c , u , w ] 萘并 [2,3- l ] 壬烯。高真空。在第二步中,从 200 °C 到 275 °C 的受控退火引发了两个连续的环化脱氢步骤,形成了 3 个新的碳-碳键。第二个构象异构体在退火步骤中也足够稳定,以类似的产率得到另一种化合物,苯并二苯并[7,8,9,10]萘并[2,1- h ]菲[9,10- p]六苯。这种更受阻物质的形成强调了在这些大型多环芳烃的环化脱氢步骤中强分子-表面相互作用的重要性。