从丙酰乙酸乙酯和2-乙基乙酰乙酸乙酯开始,我们制备了4-丙基-7,8-,4-丙基-6,7-,3-乙基-4-甲基-7,8-和3-乙基-4-甲基使其在DMF / Na 2 CO 3中与乙二醇的双二卤化物或二甲苯磺酸酯反应得到-6,7-二羟基-2 H-色农酮,得到12-冠的6,7-和7,8-色酮衍生物-4、15冠4和18冠6。使用ir,13 C和1 H nmr,ms和高分辨率质谱对产物进行鉴定。铬酮冠醚与Li +,Na +和K +的阳离子选择性。 根据游离和阳离子络合的色酮大环醚在乙腈中的稳态发射荧光光谱估算阳离子。
从丙酰乙酸乙酯和2-乙基乙酰乙酸乙酯开始,我们制备了4-丙基-7,8-,4-丙基-6,7-,3-乙基-4-甲基-7,8-和3-乙基-4-甲基使其在DMF / Na 2 CO 3中与乙二醇的双二卤化物或二甲苯磺酸酯反应得到-6,7-二羟基-2 H-色农酮,得到12-冠的6,7-和7,8-色酮衍生物-4、15冠4和18冠6。使用ir,13 C和1 H nmr,ms和高分辨率质谱对产物进行鉴定。铬酮冠醚与Li +,Na +和K +的阳离子选择性。 根据游离和阳离子络合的色酮大环醚在乙腈中的稳态发射荧光光谱估算阳离子。
Mechanochemical synthesis of coumarins <i>via</i> Pechmann condensation under solvent-free conditions: an easy access to coumarins and annulated pyrano[2,3-<i>f</i>] and [3,2-<i>f</i>]indoles
作者:Ainur D. Sharapov、Ramil F. Fatykhov、Igor A. Khalymbadzha、Vladimir V. Sharutin、Sougata Santra、Grigory V. Zyryanov、Oleg N. Chupakhin、Brindaban C. Ranu
DOI:10.1039/d1gc04564d
日期:——
A green protocol has been developed for the synthesis of simple coumarins and linear pyrano[2,3-f] and [3,2-f]indoles by the reaction of phenol derivatives with β-ketoesters under ball milling at ambient temperature in the presence of methanesulfonic acid as a mild acid catalyst. The significant advantages of this procedure are high yields, scalability, no use of hazardous acids or solvents, shorter
已开发出一种绿色方案,用于通过苯酚衍生物与 β-酮酯在环境温度下球磨下的反应,合成简单的香豆素和线性吡喃并[2,3- f ] 和 [3,2 - f ] 吲哚。甲磺酸作为温和的酸催化剂。该方法的显着优势是高产率、可扩展性、不使用有害酸或溶剂、反应时间短、环境温度低、成本低以及无需柱色谱即可直接纯化。此过程与高 EcoScale 指标和低E因子相关联。与传统的 Pechmann 缩合过程相比,机械化学方案可合成具有优异区域选择性和高产率的吡喃吲哚。
Kotwani et al., Proceedings - Indian Academy of Sciences, Section A, 1942, # 15, p. 441,443
作者:Kotwani et al.
DOI:——
日期:——
Pechmann condensation of phenols with ethyl butyroacetate
作者:N. G. Kotwani、S. M. Sethna、G. D. Advani
DOI:10.1007/bf03051833
日期:1942.6
Compositions and Methods for Reactivating Latent Immunodeficiency Virus
申请人:The J. David Gladstone Institutes
公开号:US20150133434A1
公开(公告)日:2015-05-14
The present disclosure provides compositions and methods for reactivating latent immunodeficiency vims. The methods generally involve contacting an HIV-infected cell in which HIV is latent with an agent that binds a bromodomain (BRD) in the cell. Latently infected cells contain replication-competent integrated HIV-1 genomes that are blocked at the transcriptional level, resulting in the absence of viral protein expression. The present disclosure provides methods for reducing the reservoir of latent immunodeficiency virus in an individual.