- Green synthesis method of carbazole oxime ester photoinitiator
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The invention discloses a green synthesis method of a carbazole oxime ester photoinitiator. According to the method, N-ethyl carbazole is taken as the raw material; then N-ethyl carbazole carries out condensation reactions with o-toluoyl chloride and acetic anhydride/acetyl chloride in the presence of a zirconium catalyst, and finally the condensation reaction product is oximated and esterified to obtain the carbazole oxime ester photoinitiator. The synthesis method does not need high temperature and high pressure, the conditions are mild, and thus the synthesis method is very safe. During the synthesis process, a zirconium catalyst is used, no aluminum chloride or zinc wastewater is generated therefore, the generated byproducts can be recovered, moreover, no solvent that is harmful to the environment is used, and the synthesis method is environment-friendly and is suitable for industrial production.
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- POLYMERIZABLE COMPOUND, POLYMERIZABLE COMPOSITION, POLYMER, AND OPTICALLY ANISOTROPIC BODY
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The present invention provides a polymerizable compound represented by the following formula (I), a polymerizable composition that includes the polymerizable compound and an initiator, a polymer obtained by polymerizing the polymerizable compound or the polymerizable composition, and an optically anisotropic article that includes the polymer. The invention makes it possible to provide a polymerizable compound, a polymerizable composition, and a polymer that have a practical low melting point, exhibit an excellent solubility in a general-purpose solvent, can be produced at low cost, and may produce an optical film that achieves uniform conversion of polarized light over a wide wavelength band, and an optically anisotropic article. [In formula: Q1 to Q4 represent hydrogen atoms or the like; X represents a C6-C12 divalent aromatic group or the like; Ax and Ay represent groups represented by the following formula (II); n represents 0 or 1; * represents a bonding position; Y1 to Y6 represent a single bond, -O-, -O-C(=O)-, -C(=O)-O- or the like; G1 and G2 represent divalent C1-C20 aliphatic groups or the like; Z1 and Z2 represent C2-C10 alkenyl groups or the like; A1 represents a trivalent aromatic group or the like; and A2 and A3 represent divalent C6-C30 aromatic groups or the like.]
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Paragraph 0109
(2014/05/07)
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- Synthesis of 1-{6-(2-methylbenzoyl)-N-ethylcarbazole- 3-yl}-ethane-1-one oxime O-acetate
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1-{6-(2-Methylbenzoyl)-N-ethylcarbazole-3-yl}-ethane-1-one oxime O-acetate, an excellent two-photon carbazole photoinitiator, was synthesized with moderate yield (76.9%) starting from the successive o-methyl benzoylation and acetylation of N-ethylcarbazole, followed by oximation and esterification in the article. The structure was confirmed by 1H-NMR, 13C-NMR, and IR. The by-product acetic acid in the neutralization of hydroxylamine hydrochloride is effectively utilized in esterification with the aid of the one-pot process. In particular, the phase transfer technique is applied to overcome the deficiency of low reaction rate caused by heterogeneous reaction conditions in esterification. Springer Science+Business Media B.V. 2011.
- Zhao, Liang,Qian, Chao,Gong, Ling,Chen, Xin-Zhi
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experimental part
p. 105 - 111
(2012/05/20)
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