Indole as Neutral Leaving Group in Silver Nitrate Induced Cyclization Reactions of<i>N</i>-{2-[Alkynyl(hetero)aryl]methylene}indolin-1-amines for the Synthesis of Annulated Pyridine Derivatives
nitrate in chloroform at 60 °C, electrophilic cyclization reactions to afford annulated pyridine derivatives 4. Mechanistically, the silver(I)-assisted 6-endo-dig ring-closure process of compounds 3 leads to the formation of an intermediate pyridinium cation, which releases - besides the products 4 ― indole as unusual but efficient neutralleavinggroup after N-N bond cleavage. It is shown that among the
Imaging agents for detecting neurological disorders
申请人:Gangadharmath Umesh B.
公开号:US20100239496A1
公开(公告)日:2010-09-23
Imaging agents of formula (I) and methods for detecting neurological disorders comprising administering to a patient in need compounds of formula (I) capable of binding to tau proteins and β-amyloid peptides are presented herein. The invention also relates to methods of imaging Aβ and tau aggregates comprising introducing a detectable quantity of pharmaceutical formulation comprising a radiolabeled compound of formula (I) and detecting the labeled compound associated with amyloid deposits and/or tau proteins in a patient. These methods and compositions enable preclinical diagnosis and monitoring progression of AD and other neurological disorders.
A room-temperature protocol to access isoquinolines through Ag(<scp>i</scp>) catalysed annulation of o-(1-alkynyl)arylaldehydes and ketones with NH<sub>4</sub>OAc: elaboration to berberine and palmatine
作者:Virsinha Reddy、Abhijeet S. Jadhav、Ramasamy Vijaya Anand
DOI:10.1039/c4ob02641a
日期:——
A silver catalysed protocol for the synthesis of a wide range of isoquinolines from o-(1-alkynyl)arylaldehydes has been developed under mild conditions and elaborated to the synthesis of berberine and palmatine.
Imaging Agents for Detecting Neurological Disorders
申请人:Szardenings Anna Katrin
公开号:US20110182812A1
公开(公告)日:2011-07-28
Imaging agents of formulas (I)-(V) and methods for detecting neurological disorders comprising administering to a patient in need compounds of formulas (I)-(V) capable of binding to tau proteins and β-amyloid peptides are presented herein. The invention also relates to methods of imaging Aβ and tau aggregates comprising introducing a detectable quantity of pharmaceutical formulation comprising a radiolabeled compound of formulas (I)-(V) and detecting the labeled compound associated with amyloid deposits and/or tau proteins in a patient. These methods and compositions enable preclinical diagnosis and monitoring progression of AD and other neurological disorders.
作者:Shuai, Sujuan、Mao, Jianyou、Zhou, Fan、Yan, Qifeng、Chen, Lingfeng、Li, Jie、Walsh, Patrick J.、Liang, Guang
DOI:10.1021/acs.joc.4c00123
日期:——
A convenient method for preparing 3-aryl isoquinolines via a base-promoted tandem reaction is presented. Simply combining commercially available 2-methyl-arylaldehydes, benzonitriles, NaN(SiMe3)2, and Cs2CO3 enabled the synthesis of a variety of isoquinolines (23 examples, ≤90% yield). Among the syntheses of isoquinolines, the transition metal-free method described here is straightforward, practical
提出了一种通过碱促进的串联反应制备 3-芳基异喹啉的简便方法。简单地组合市售的2-甲基芳基醛、苯甲腈、NaN(SiMe 3 ) 2和Cs 2 CO 3就可以合成多种异喹啉(23个实例,≤90%产率)。在异喹啉的合成中,本文描述的无过渡金属方法简单、实用且操作简单。