吡嗪是有机光电材料中使用的重要分子支架。在这里,我们报告有效的方法来合成二吡咯并吡嗪和吡咯并噻吩并吡嗪衍生物,其中涉及二卤代吡咯并吡嗪的区域选择性胺化反应。所开发的方案容易从相应的2-溴-3-氯-5 H-吡咯并[2,3- b ]吡嗪提供2-氨基-或3-氨基-吡咯并吡嗪。当胺化反应在不含金属的微波辐射下进行时,仅获得3-氨基-吡咯并吡嗪。相反,2-溴-3-氯-5 H-吡咯并[2,3- b]吡嗪仅提供2-氨基-吡咯并吡嗪。使用Sonogashira反应将吡咯并吡嗪支架转化为相应的1,7-和1,5-二氢二吡咯并[2,3- b ]吡嗪衍生物。对合成化合物的光学性质,热性质和分子堆积进行了全面的研究。结果表明,1,7衍生物可能是有前途的有机材料,可用于光电应用。
Regioselective synthesis of dipyrrolopyrazine (DPP) derivatives via metal free and metal catalyzed amination and investigation of their optical and thermal properties
作者:Puttavva Meti、Eun-Sil Lee、Jung-Won Yang、Young-Dae Gong
DOI:10.1039/c7ra01795b
日期:——
Pyrazine is an important molecular scaffold employed in organic optoelectronic materials. Here we report efficient methods for the synthesis of dipyrrolopyrazine, and pyrrolothieno-pyrazine derivatives that involve regio-selective amination reactions of dihalo-pyrrolopyrazines. The developed protocol readily affords either 2-amino- or 3-amino-pyrrolopyrazines from the corresponding 2-bromo-3-chloro-5H-pyrrolo[2
吡嗪是有机光电材料中使用的重要分子支架。在这里,我们报告有效的方法来合成二吡咯并吡嗪和吡咯并噻吩并吡嗪衍生物,其中涉及二卤代吡咯并吡嗪的区域选择性胺化反应。所开发的方案容易从相应的2-溴-3-氯-5 H-吡咯并[2,3- b ]吡嗪提供2-氨基-或3-氨基-吡咯并吡嗪。当胺化反应在不含金属的微波辐射下进行时,仅获得3-氨基-吡咯并吡嗪。相反,2-溴-3-氯-5 H-吡咯并[2,3- b]吡嗪仅提供2-氨基-吡咯并吡嗪。使用Sonogashira反应将吡咯并吡嗪支架转化为相应的1,7-和1,5-二氢二吡咯并[2,3- b ]吡嗪衍生物。对合成化合物的光学性质,热性质和分子堆积进行了全面的研究。结果表明,1,7衍生物可能是有前途的有机材料,可用于光电应用。
[EN] COMPOSITIONS AND METHODS FOR ASSESSING EYE VASCULATURE<br/>[FR] COMPOSITIONS ET MÉTHODES POUR ÉVALUER LE SYSTÈME VASCULAIRE DE L'ŒIL
申请人:MEDIBEACON INC
公开号:WO2016183351A1
公开(公告)日:2016-11-17
The present disclosure relates to compositions and methods for assessing blood vessels and organs of the body, more specifically to methods for assessing the vasculature of the eye.
本公开涉及用于评估人体血管和器官的组合物和方法,更具体地说是用于评估眼部血管的方法。
COMPOSITIONS AND SYSTEMS FOR RENAL FUNCTION DETERMINATION
申请人:MediBeacon Inc.
公开号:US20190125901A1
公开(公告)日:2019-05-02
The present disclosure relates to systems and methods for determining the renal glomerular filtration rate or assessing the renal function in a patient in need thereof. The system includes a computing device, a power supply, one or more sensors, and at least one tracer agent that fluoresces when exposed to electromagnetic radiation. The electromagnetic radiation is detected using the sensors, and the rate in which the fluorescence decreases in the patient is used to calculate the renal glomerular filtration rate in the patient.
Pyrazine Derivatives and Uses Thereof in Renal Monitoring
申请人:Rajagopalan Raghavan
公开号:US20120100078A1
公开(公告)日:2012-04-26
The present invention relates to pyrazine derivatives such as those represented by Formulas I and II below.
X
1
to X
4
of the compounds of Formulas I and II may be characterized as electron withdrawing groups. In contrast, Y
1
to Y
4
of the compounds of Formulas I and II may be characterized as electron donating groups. Pyrazine derivatives of the present invention may be utilized in assessing renal function. In particular, an effective amount of a pyrazine derivative of the invention may be administered into a body of a patient. The pyrazine derivative that is in the body may be exposed to visible and/or infrared light to cause spectral energy to emanate from the pyrazine derivative. This emanating spectral energy may be detected and utilized to determine renal function of the patient.
PYRAZINE DERIVATIVES WITH EXTENDED CONJUGATION AND METHODS OF USING THE SAME IN OPTICAL APPLICATIONS
申请人:MediBeacon Inc.
公开号:US20160090376A1
公开(公告)日:2016-03-31
The present invention relates to pyrazine derivatives capable of absorbing and emanating spectral energy in the visible and/or near infrared spectrum. Pyrazine derivatives of the invention may be administered to a patient in the form of a pharmaceutically acceptable composition and utilized in medical (e.g., diagnostic imaging) procedures.