92-84-2Relevant articles and documents
A highly selective phenothiazine-based fluorescence 'turn-on' indicator based on cyanide-promoted novel protection/deprotection mechanism
Garg, Bhaskar,Ling, Yong-Chien
, p. 8809 - 8812 (2015)
A cyanide anion (CN-)-triggered deprotection of NH-protected phenothiazine, (E)-10-(10H-phenothiazin-3′-yl)propenal, has been discovered as a novel mechanism for the highly selective fluorescence detection of CN- under ambient conditions. The present protocol may pave the way for its broad application in organic synthesis in the near future. This journal is
14N/15N isotope effect on the electron transfer process between phenothiazine and its radical cation
Wu, Long-Min,Lue, Jian-Ming,Wen, Xiao-Lin,Jia, Xue-Qing,Liu, You-Cheng,Liu, Zhong-Li
, p. 152 - 158 (1997)
An appreciable equilibrium isotope effect has been observed for electron transfer from phenothiazine (PT) to the radical cation of its 15N-substituted analogue ([15N]PT+?), i.e. equation presented via electron paramagnetic resonance analysis of the mixed radical cations formed from mixing the [15N]phenothiazine radical cation hexachloroantimonate and phenothiazine in acetonitrile (K=0·77±0·10 at 25 °C), and by physical separation of the neutral phenothiazines from the radical cation salts in the equilibrium mixture (K=0·83±0·10 at 25 °C). Infrared and Raman spectra of [14N]- and [15N]phenothiazines and their radical cations were measured to assign the vibrational frequency shifts caused by the heavy-atom substitution and radical cation formation, which gave an estimate of the enthalpy change of 441·7 J mol-1 for the electron transfer process. These results reveal that 15N substitution of phenothiazine decreases appreciably the ionization potential of the molecule, making it easier to lose an electron to form the corresponding radical cation in solution.
Stability of 10-acetylphenothiazine
Roseboom,Forch
, p. 515 - 517 (1979)
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Sugarcane field weeding composition
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Paragraph 0018; 0033; 0042; 0051; 0060; 0069; 0077, (2021/06/26)
The invention discloses a weeding composition for a sugarcane field. The weeding composition is prepared from the following components in percentage by weight: 1-60% of triclopyr, 1-30% of metrazone-dinitrate, 1-50% of a weeding substance, 20-40% of silicon dioxide sol, 1-3% of a surfactant, 5-10% of triethanolamine, 3-10% of vegetable oil and the balance of a carrier. According to the invention, a pesticide application method that various herbicides such as triclopyr, Mesotrione, ametryn, cyanazine and atrazine are mixed together is adopted, so that the prevention and control effect of the herbicide is synergistic; The herbicide controlling spectrum can be greatly expanded, the number of times of pesticide application is reduced, the pesticide effect is improved, the proper period of pesticide application is prolonged, the pesticide damage to crops is reduced, the residual activity of the herbicide is reduced, and the occurrence and development of herbicide resistance of the herbicide are delayed. The silicon dioxide sol containing antioxidant groups is used for coating the weeding components, so that the application is safer, the antioxidant activity of the weeding composition is remarkably improved, and the weeding composition is easier to store.
One-Pot Tandem Access to Phenothiazine Derivatives from Acetanilide and 2-Bromothiophenol via Rhodium-Catalyzed C-H Thiolation and Copper-Catalyzed C-N Amination
Rui, Xiyan,Wang, Chao,Si, Dongjuan,Hui, Xuechao,Li, Keting,Wen, Hongmei,Li, Wei,Liu, Jian
, p. 6622 - 6632 (2021/05/29)
A one-pot and step economic reaction involving Rh(III)-catalyzed C-H thiolation and relay Cu(II)-catalyzed C-N amination of acetanilide and 2-bromothiophenol is reported here, with several valuable phenothiazine products obtained. This synthesis protocol proceeds from easily starting materials, demonstrating high atom economy, broad substrate scope, and good yield. Furthermore, the directing group can be easily eliminated, and chlorpromazine is provided in a large scale; thus this synthesis protocol could be utilized to construct phenothiazine scaffolds.
A NaH-promoted N-detosylation reaction of diverse p-toluenesulfonamides
Sun, Wanwan,Chen, Xiaobei,Hu, Ying,Geng, Huihui,Jiang, Yuanrui,Zhou, Yuxin,Zhu, Wenjing,Hu, Min,Hu, Haohua,Wang, Xingyi,Wang, Xinli,Zhang, Shilei,Hu, Yanwei
supporting information, (2020/10/05)
A NaH-mediated detosylation reaction of various Ts-protected indoles, azaheterocycles, anilines and dibenzylamine was reported. The method features cheap reagent, convenient operations, mild reaction conditions and broad substrate scope. Moreover, this study revealed that the loading of NaH in tosylation reactions of nitrogen-containing compounds with NaH as a base in DMA or DMF should be controlled due to the possibility of adverse detosylation.