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METHOD OF PREPARING PHOTOSTABUILIZATOR WITH STERICALLY DIFFICULT AMINE
METHOD OF PREPARING PHOTOSTABUILIZATOR WITH STERICALLY DIFFICULT AMINE
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机译:具有位难位胺的光增效剂的制备方法
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摘要
FIELD: organic chemistry. SUBSTANCE: reaction is carried out using alkyl-substituted 4-hydroxypiperidine of the formula (I) -N-C(RCH2)(CH3-CH-CH(OH)-CH-C(CH3)(CH2R), where R - hydrogen or methyl and dicarboxylic acid ester of the formula (II) R-O-C(O)-(CH2)n-C(O)-OR, where R and R - linear or branched (C1-C12)-alkyl, (C5-C12)-cycloalkyl, (C6-C12)-aryl or (C7-C12)-alkaryl, or arylalkyl that can be similar or different; n - whole number 1-12. Reaction is performed in the medium of polar aprotonic organic compound taken from the group involving N-methylpyrrolidinone, 1,2-dimethoxybenzene, N,N-dimethylacetamide, hexamethyltrophosphoroamide, dimethylaminopyridine, tetramethylsulfone, tetraethylene glycol dimethyl ester, ethylene glycol dimethyl ester, N,N, N,N-tetramethylethylenediamine, 1,3-dimethyl-2-imidazolidinone, dimethylsulfoxide, 12-crown-4 taken at concentration 5-12 wt.-% of total reagent quantity, at 80-165 C, at molar ratio of compound of the formula (I) and compound of the formula (II) (2: 1)-(3.2:1). EFFECT: improved method of synthesis. 15 cl
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