- Novel, green and efficient method for synthesizing tetraphenolic ethane
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The invention discloses a novel, green and efficient method for synthesizing tetraphenolic ethane, and belongs to the field of organic chemistry. The structural formula of the tetraphenolic ethane isshown as 1. The synthesis method of the tetraphenolic ethane comprises the following four steps: synthesis of a photocatalyst CCN-K, synthesis of 4, 4'-(1, 2-bis (4-(benzyloxy) phenyl) ethane 1, 2-diyl) bis (2, 6-di-tert-butylphenol), synthesis of 4, 4'-(1, 2, bis (4-hydroxy phenyl) ethane-1, 2-diyl) bis (2, 6-di-tert-butylphenol) and synthesis of tetraphenolic ethane. The method has the technicaleffects that firstly, the synthetic product tetraphenol ethane plays an important role in the fields of printed circuit boards, electronic and electrical materials, packaging materials, adhesives andthe like; secondly, visible light catalytic synthesis is inserted into the method, so that the method is an efficient and safe environment-friendly technology; and finally, the cost is low, and large-scale preparation can be realized.
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Paragraph 0043-0047
(2021/01/30)
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- BENZOXAZINE-BASED MIXTURE AND USE THEREOF
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The present invention relates to a benzoxazine-based mixture and a use thereof and, more specifically, to a benzoxazine-based mixture and a use of a cured product in which the benzoxazine-based mixture is cured, wherein the benzoxazine-based mixture has high dielectric characteristics, heat resistant characteristics, and flame-retardant characteristics by comprising a benzoxazine ring in a molecular structure, and thus can be applied to a sealing material, a molding material, a template material, an adhesive, a material for an electric insulation paint, and the like, which are used for a copper clad laminate or an electronic part, used in a printed circuit board.
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Paragraph 0081-0087
(2019/06/14)
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- METHOD FOR PRODUCING 1,2-PHENYLETHANE COMPOUND USING ATOM TRANSFER RADICAL COUPLING REACTION
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An object of the present invention is to provide a method capable of producing a 1,2-phenylethane compound with extremely high yield in a short amount of time. Disclosed is a method for producing a 1,2-phenylethane compound, which comprises subjecting a compound represented by formula (I): wherein Ra represents a hydrogen atom or a substituted or unsubstituted phenyl group; Rb represents a hydrogen atom or a substituent; n represents an integer of 1 to 5 and, when n is 2 or more, Rb may be the same or different, or may be combined with each other to form a ring; and X represents a halogen atom; to a coupling reaction in the presence of a transition metal complex to produce a compound represented by formula (II):
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Page/Page column 9-10
(2009/01/23)
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- METHOD FOR PRODUCING TETRAKISPHENOLETHANE COMPOUND
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PROBLEM TO BE SOLVED: To provide a method for producing a tetrakisphenolethane compound represented by formula (3) in a high yield and with a high production efficiency. SOLUTION: The method for producing a tetrakisphenol compound represented by formula (3) (wherein R1, R3, R4, and R6 are each hydrogen, a 1-20C alkyl group, a halogen or the like; R2 and R5 are each hydrogen, a 1-20C alkyl group, a 1-20C alkoxyalkyl group or the like; and R9 and R10 are each hydrogen, a 1-20C alkyl group, a halogen, a 1-20C alkoxy group, a 1-20C haloalkoxy group or the like) comprises reacting a dioxyethane compound represented by formula (1) (wherein R1, R2, R3, R4, R5, and R6 are the same as defined above; and R7 and R8 are each hydrogen, a 1-20C alkyl group, a 1-20C alkoxyalkyl group or the like ) with a phenol represented by formula (2) (wherein R9 and R10 are the same as defined above) in the presence of an acid catalyst. COPYRIGHT: (C)2006,JPOandNCIPI
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Page/Page column 16-17
(2008/06/13)
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