Synthesis and spectroscopic characterization of red-shifted spironaphthoxazine based optical switch probes
摘要:
Spironaphthoxazine (NISO) is an efficient optical switch probe that has applications in high contrast detection of Forster resonance energy transfer (FRET) using optical lock-in detection (OLID). NISO exists in two distinct states, spiro (SP) and merocyanine (MC), that can be independently controlled by using alternate irradiation with near ultraviolet and visible light. Unfortunately, the SP-state of NISO has an absorption centered at 350 nm, which may lead to phototoxic effects when manipulating the probe within a living cell. To overcome this problem we introduce new, red-shifted amino-substituted NISO probes compared to NISO that undergo an efficient SP to MC transition in response to irradiation by using 405-nm light, which is less damaging to living cells. This study details the synthesis of amino-substituted NISO and their N-hydroxysuccinimide ester and maleimide derivatives and their use in generating covalent attached protein conjugates. This study also presents a characterization of the spectroscopic and optical switching properties of these red-shifted NISO probe in solution. (C) 2010 Elsevier Ltd. All rights reserved.
corresponding triazole derivatives, which were converted to dimethyl 1H-benz[g]indole-2,3-dicarboxylates by photocyclization. The reaction of the diesters with hydrazine hydrate gave the corresponding 8,9-dihydrobenzo[g]-pyridazino[4,5-b]indole-7,10(11H)-diones (5). One of compounds 5 was found to have chemiluminescentactivity similar to luminol.
取代的和未取代的萘胺被转化为相应的三唑衍生物,并通过光环化将其转化为1 H-苯并[ g ]吲哚-2,3-二羧酸二甲酯。二酯与水合肼的反应得到相应的8,9-二氢苯并[ g ]-哒嗪并[4,5 - b ]吲哚-7,10 (11H)-二酮(5)。发现化合物5之一具有与鲁米诺相似的化学发光活性。
Synthesis and spectroscopic characterization of red-shifted spironaphthoxazine based optical switch probes
作者:Chutima Petchprayoon、Gerard Marriott
DOI:10.1016/j.tetlet.2010.10.084
日期:2010.12
Spironaphthoxazine (NISO) is an efficient optical switch probe that has applications in high contrast detection of Forster resonance energy transfer (FRET) using optical lock-in detection (OLID). NISO exists in two distinct states, spiro (SP) and merocyanine (MC), that can be independently controlled by using alternate irradiation with near ultraviolet and visible light. Unfortunately, the SP-state of NISO has an absorption centered at 350 nm, which may lead to phototoxic effects when manipulating the probe within a living cell. To overcome this problem we introduce new, red-shifted amino-substituted NISO probes compared to NISO that undergo an efficient SP to MC transition in response to irradiation by using 405-nm light, which is less damaging to living cells. This study details the synthesis of amino-substituted NISO and their N-hydroxysuccinimide ester and maleimide derivatives and their use in generating covalent attached protein conjugates. This study also presents a characterization of the spectroscopic and optical switching properties of these red-shifted NISO probe in solution. (C) 2010 Elsevier Ltd. All rights reserved.