32327-90-5Relevant articles and documents
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Kwan et al.
, p. 4783,4785, 4786 (1978)
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Preparation method of TEMPO-4-ammonium chloride
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Paragraph 0012; 0035-0036; 0045; 0048, (2021/11/21)
The invention relates to the field, and particularly provides a preparation method of TEMPO-4-ammonium chloride, the preparation method comprises the following steps: S1, triacetonamine and dimethylamine are added into water, and then a hydrogenation catalyst is added for hydrogenation reduction reaction to obtain N, N, 2, 2, 6, 6-hexamethylpiperidyl-4-amine; s2, under the action of a catalyst, the N, N, 2, 2, 6, 6-hexamethyl piperidyl-4-amine and hydrogen peroxide are subjected to an oxidation reaction in a solvent, and N, N, 2, 2, 6, 6-hexamethyl piperidyloxy-4-amine is obtained; s3, N, N, 2, 2, 6, 6-hexamethylpiperidyloxy-4-amine is added into the aprotic solvent, then chloromethane is introduced, and the target product TEMPO-4-ammonium chloride is obtained through a reaction, the raw material conversion rate is high, the solvent is green and environmentally friendly and can directly enter the next step for oxidation reaction operation; the whole reaction process is simple and easy to operate, the purification steps are few, the product purity is high, the cost is low, atoms are economical, and the concept of green production is met.
Hindered amine light stabilizer intermediate, and preparation method and application thereof
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Paragraph 0018; 0037-0066, (2020/12/14)
The invention discloses a hindered amine light stabilizer intermediate. The structural formula of the hindered amine light stabilizer intermediate is shown as a formula I which is described in the specification. In the formula I, R is a C1-C4 alkyl group. The light stabilizer intermediate disclosed by the invention can be used for synthesizing polyester fibers, and the light stability of the fibers is increased or improved by supplementing hindered amine functional groups outside a main chain. The invention also discloses a preparation method and application of the light stabilizer intermediate.
PROCESS FOR PREPARING AN N-METHYL-SUBSTITUTED TRIACETONAMINE COMPOUND
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Paragraph 0558-0561, (2016/08/17)
An N-methyl-substituted triacetonamine compound is prepared by reacting at least one triacetonamine compound (I) with formaldehyde under reductive conditions, in the presence of hydrogen and in the presence of a supported catalyst, wherein the supported catalyst contains at least one metal M, wherein the metal M is selected from the group consisting of V, Cr, Mo, Mn, Ni, Pd, Pt, Fe, Ru, Os, Co, Rh, Ir, and Cu.