Synthetic Routes to Fluorescent Dyes Exhibiting Large Stokes Shifts
摘要:
Derivatives of isomeric 2-(hydroxytolyl)-4,6-dimethylamino-1,3,5-triazines have been synthesized in high yields in a controlled manner using a multistep reaction sequence. Iodination of either 2-(1'-hydroxy-6'-methylphen-2'-yl)- or 2-(1'-hydroxy-4'-methylphen-2'-yl)-4,6-dimethylamino-1,3,5-triazine with ICl provides species differing in the positioning of the iodo group relative to the hydroxyl which readily undergo Suzuki, Sonogashira, and Heck reactions under Pd(0) catalysis. Thus, thienyl, bisthienyl, and 3,4-ethylenedioxythienyl groups have been directly grafted, while unsubstituted polycyclic aromatics such as pyrene and perylene have been linked via alkyne bridges, as have ethynyldifluoroborondipyrromethane (BODIPY) dyes prepared in situ. The presence of a hydrogen bond in the ground state involving the hydroxyl substituent has been established by proton NMR and several X-ray structure determinations. All of the new dyes with a simple substituent (phenyl, thienyl) exhibited a pronounced green fluorescence resulting from an intramolecular proton transfer:in:the excited state (ESIPT) which produces a large Stokes shift (> 10 000 cm(-1)). With other dyes, the fluorescence of the keto form responsible for the ESIPT process could be used as the.input energy in efficient intramolecular energy transfer processes. Replacing perylene with pyrene allowed reversal of the direction of energy transfer from the polyaromatic module to the keto form.
Selective HDAC inhibitors with potent oral activity against leukemia and colorectal cancer: Design, structure-activity relationship and anti-tumor activity study
作者:Xiaoyang Li、Yingjie Zhang、Yuqi Jiang、Jingde Wu、Elizabeth S. Inks、C. James Chou、Shuai Gao、Jinning Hou、Qinge Ding、Jingyao Li、Xue Wang、Yongxue Huang、Wenfang Xu
DOI:10.1016/j.ejmech.2017.03.069
日期:2017.7
Previously, we reported the discovery of a series of N-hydroxycinnamamide-based HDACinhibitors, among which compound 11y exhibited high HDAC1/3 selectivity. In this current study, structural derivatization of 11y led to a new series of benzamide basedHDACinhibitors. Most of the compounds exhibited high HDACsinhibitory potency. Compound 11a (with 4-methoxybenzoyl as N-substituent in the cap and
Pyrrolobenzodiazepine pyridine carboxamides and derivatives as follicle-stimulating hormone receptor antagonists
申请人:Failli A. Amedeo
公开号:US20060287522A1
公开(公告)日:2006-12-21
This invention provides pyrrolobenzodiazepine pyridine carboxamides selected from those of Formula (1), which act as follicle stimulating hormone receptor antagonists. The invention also provides pharmaceutical compositions and methods of treatment utilizing the compounds of Formulae (1) and (2).
Propionic Acid Derivatives and Methods of Use Thereof
申请人:Biediger Ronald J.
公开号:US20180312523A1
公开(公告)日:2018-11-01
Provided herein are compounds and pharmaceutical compositions of formula I
where R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as described herein. Also provided pharmaceutically acceptable salts or stereoisomers of these compounds. In addition methods are provided for inhibiting the binding of an integrin to treat various pathophysiological conditions.
Biaryl-methanethio-, -sulphinyl- and sulphonyl derivatives
申请人:CEPHALON, INC.
公开号:EP1586559A1
公开(公告)日:2005-10-19
FIELD OF THE INVENTION
The present invention is related to chemical compositions, processes for the preparation thereof and uses of the composition. Particularly, the present invention relates to compositions that include substituted biaryl-methanesulfinyl acetamides of Formula (I):
wherein Ar, Y, R1, R2, R4, R5, q and x are as defined herein; and their use in the treatment of diseases, including treatment of sleepiness associated with narcolepsy, obstructive sleep apnea, or shift work disorder; Parkinson's disease; Alzheimer's disease; attention deficit disorder; attention deficit hyperactivity disorder; depression; or fatigue associated with a neurological disease; as well as the promotion of wakefulness.
Ionic liquid-mediated benzoyl transfer-coupling in the Suzuki and Sonogashira reactions and aryl transfer-coupling by decarbonylative Heck reaction, using N-Benzoyl-saccharin (NBSac) as reagent
作者:Shruti S. Malunavar、Suraj M. Sutar、Pavankumar Prabhala、Rajesh G. Kalkhambkar、Kenneth K. Laali
DOI:10.1016/j.tetlet.2020.151987
日期:2020.6
of N-benzoyl-saccharin (NBSac) as reagent for selective benzoyl transfer-coupling in the Suzuki reaction in BMIM-IL/[PAIM][NTf2] as solvent/base, and in the Sonogashira reaction employing guanidinium-IL (GIL) as solvent, are demonstrated. Decarbonylative aryl transfer-coupling occurs in the Heck reaction employing GIL as solvent. The reactions are catalyzed by Pd(OAc)2 or NiCl2(dppp), are performed