- Method for synthesizing 2,5-diaminohydroquinone dihydrochloride
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The invention discloses a method for synthesizing 2,5-diaminohydroquinone dihydrochloride. The method for synthesizing 2,5-diaminohydroquinone dihydrochloride includes the steps that under normal temperature, raw materials including chloranil and a reaction solvent are added into a reaction container, stirring is conducted, ammonium hydroxide is dropwise added, after dropwise addition is completed, temperature is increased to 50-80 DEG C, an ammonolysis reaction is conducted for 2-8 h, then reaction liquid is subjected to after-treatment, and finally an intermediate which is 2,5-diamino-3,6- dichloro-benzoquinone is obtained; 2,5-diamino-3,6-dichloro-benzoquinone, water and Pd/C are added into a reaction kettle for a reduction reaction for 1-8 h at the temperature of 40-80 DEG C and underhydrogen pressure of 0.1-0.6 MPa, then reaction liquid is subjected to after-treatment, and finally the 2,5-diaminohydroquinone dihydrochloride is obtained. Reaction technology parameters are easy tocontrol, energy consumption is low, no toxic side products are generated, the yield is good, purity is high, and industrial feasibility is high.
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Paragraph 0024; 0029-0033; 0036; 0038; 0039; 0041; 0042
(2019/04/26)
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- An efficient synthesis of 2,6-disubstituted benzobisoxazoles: New building blocks for organic semiconductors
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(Chemical Equation Presented) 2,6-Disubstituted benzobisoxazoles have been synthesized by a highly efficient reaction of diaminobenzene diols with various orthoesters. The scope of this new reaction for the synthesis of substituted benzobisoxazoles has been investigated using four different orthoesters. The utility of these compounds as building blocks for the synthesis of conjugated polymers is demonstrated.
- Mike, Jared F.,Makowski, Andrew J.,Jeffries-El, Malika
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supporting information; experimental part
p. 4915 - 4918
(2009/05/31)
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- Preparation of diamino- and dialkylaminobenzenediols
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Prepare diamino- or dialkylaminobenzenediols by hydrogenating benzoquinone compounds in the presence of a solvent and a catalyst.
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