1734-00-5Relevant articles and documents
Cation Complexation, Photochromism, and Reversible Ion-Conducting Control of Crowned Spironaphthoxazine
Kimura, Keiichi,Kaneshige, Masayuki,Yamashita, Takashi,Yokoyama, Masaaki
, p. 1251 - 1256 (1994)
A spironaphthoxazine derivative incorporating a monaza-12-crown-4 moiety at the 5'-position has been designed as a light-resistant, cation-complexable photochromic compound.Complexation of alkali metal ions by the crown moiety in the crowned spironapthoxazine allows the spironaphthoxazine skeleton to isomerize to its corresponding open colored form, even under dark conditions.Specifically, Li(1+) complexation greatly stabilizes the open colored form due to the intramolecular interaction between its oxo group and crown-complexed cation, as well as the selective Li(1+) complexation of its 12-crown-4 moiety.Taking advantage of the high Li(1+) selectivity in the cation-induced isomerization of crowned spironaphthoxazine, the thermal stability of the open colored form can be modulated continuously by added Li(1+) concentrations.Even in the presence of the metal ion, UV- and visible-light irradiation led to futher isomerization to the open form and back-isomerization to the initial closed form, respectively.Photoisomerization of crowned spironaphthoxazine to its open form promoted Li(1+) binding due to the additional axial interaction with the crown-complexed Li(1+), while that back to the closed form attenuated the cation binding.The photoinduced change in the cation-binding ability of crowned spironaphthoxazine, which possesses high light-fatigue resistance, has led to a highly reversible, photochemical switching system of ionic conduction.
Method for preparing naphthol AS-OL by micro-channel continuous method
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Paragraph 0018-0019, (2020/05/02)
The invention discloses a method for preparing naphthol AS-OL by a micro-channel continuous method. The method comprises the following specific steps: carrying out an N-acylation reaction in a micro-channel reactor by using 2-hydroxy-3-naphthoic acid and o-toluidine as raw materials to generate N-acyl arylamine naphthol AS-OL, wherein the 2-hydroxy-3-naphthoic acid is a weak acylation reagent andneeds to generate acyl chloride with a dehydrating agent phosphorus trichloride so as to further be subjected to amidation with the o-toluidine. The method comprises: feeding material into a micro-channel reactor through a metering pump, uniformly mixing, carrying out an amidation reaction at 80-150 DEG C for 5-30 minutes, collecting the effluent of the micro-channel reactor, and carrying out steam distillation, water washing, filtering and other steps to obtain the naphthol AS-OL. According to the invention, the yield of the method is 90-96%; and the method is easy to operate and control, short in production period, capable of realizing multiple amplification through parallel connection, free of amplification effect, capable of reducing environmental pollution, few in obtained by-products, high in selectivity, good high product quality and particularly suitable for industrial production.
Solvatofluorochromic flavonoid dyes with enlarged transition dipole moments enable the ratiometric detection of methanol in commercial biodiesel with improved sensitivities
Du, Bing,Huang, Yingying,Liu, Bin,Qin, Tianyi,Xu, Hanhong,Xun, Zhiqing,Yao, Guangkai,Zhao, Chen
supporting information, p. 16808 - 16814 (2020/12/30)
Detection of methanol in commercial biodiesel is essential to evaluate the fuel quality associated with the matter of driving safety. Compared to the standard GC method, the fluorescent detection method for methanol is much simpler and faster, but still u
SAR optimization studies on modified salicylamides as a potential treatment for acute myeloid leukemia through inhibition of the CREB pathway
Chae, Hee-Don,Cox, Nick,Capolicchio, Samanta,Lee, Jae Wook,Horikoshi,Kam, Sharon,Ng, Andrew A.,Edwards, Jeffrey,Butler, Tae-León,Chan, Justin,Lee, Yvonne,Potter, Garrett,Capece, Mark C.,Liu, Corey W.,Wakatsuki, Soichi,Smith, Mark,Sakamoto, Kathleen M.
supporting information, p. 2307 - 2315 (2019/06/27)
Disruption of cyclic adenosine monophosphate response element binding protein (CREB) provides a potential new strategy to address acute leukemia, a disease associated with poor prognosis, and for which conventional treatment options often carry a significant risk of morbidity and mortality. We describe the structure-activity relationships (SAR) for a series of XX-650-23 derived from naphthol AS-E phosphate that disrupts binding and activation of CREB by the CREB-binding protein (CBP). Through the development of this series, we identified several salicylamides that are potent inhibitors of acute leukemia cell viability through inhibition of CREB-CBP interaction. Among them, a biphenyl salicylamide, compound 71, was identified as a potent inhibitor of CREB-CBP interaction with improved physicochemical properties relative to previously described derivatives of naphthol AS-E phosphate.
