Benzyne addition to N-alkyl-4-hydroxy-1-methylisoquinolinium salts; a new and convenient synthesis of (±)-5-methyl-10,11-dihydro-5H-dibenzo-[a,d]cyclohepten-5,10-imine (MK801)
摘要:
Addition of benzyne, generated by three different methods, to N-benzyl-4-hydroxy-1-methylisoquinolinium betaine provides N-benzyl-5-methyl-11-oxo-5H-dibenzo[a,d] cyclohepten-5,10-imine which can be converted to MK801.
Excited‐state intramolecular proton transfer (ESIPT) molecules, which feature large Stokes shifts to avoid self‐absorption, play an essential role in photoluminescent bioimaging probes. Herein, we report the development of an ESIPT molecule 3‐(3‐hydroxypyridin‐2‐yl)isoquinolin‐4‐ol (PiQ). PiQ not only undergoes a distinct ESIPT process unlike the symmetrical 2,2′‐bipyridyl‐3,3′‐diol but also exhibits aggregation‐induced emission (AIE) characteristics. PiQ self‐assembles into aggregates with an average size of 241.0 ± 51.9 nm in aqueous solutions, leading to significantly enhanced photoluminescence. On the basis of the ESIPT and AIE characteristics of PiQ, the latter is functionalized with a hydrogen peroxide‐responsive 4‐pinacoratoborylbenzyl group (B) and a carboxylesterase‐responsive acetyl group (A) to produce a photoluminescent probe B‐PiQ‐A. The potential of PiQ for applications in bioimaging and chemical sensing is underscored by its efficient detection of both endogenous and exogenous hydrogen peroxide in living cells.
[EN] SENSOR DYES FOR REAL-TIME SENSING OF METAL IONS IN AQUEOUS ENVIRONMENTS<br/>[FR] COLORANTS DE DÉTECTION POUR LA DÉTECTION EN TEMPS RÉEL D'IONS MÉTALLIQUES DANS DES ENVIRONNEMENTS AQUEUX
申请人:UWM RES FOUND INC
公开号:WO2017066672A1
公开(公告)日:2017-04-20
Provided herein are dyes for detecting and distinguishing metals in a sample, as well as compositions and methods comprising the same.