• Journal of Nutrition and Health
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• 제11권1호
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• pp.17-20
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• 1978

The materials carcinogenic agent, nitrosoamine, is distributed in food circumstances, and is formed when both nitrite and secondary amine are present. Nitrites are added to fishes as a color fixative or preservative and secondary amines exist in fishes. In order to find the distribution and contents of secondary amines, analysis of 19 kinds of fish was conducted. The results showed that, significant differences were not observed in the quantity of secondary amines in 19 kinds of fish by district. The highest value was 20.29 ppm in Theragra chalocogramma and the lowest was 0.022 ppm in Ostrea denselamellosa. Six fishes below 1 ppm were Nibea imbricata, Misgurnus mizolepis, Astroconger myriaster, Evynnis Japonica, Ostrea denselamellosa and Solen gouldi. Dimethyl amine only was identified and diethylamine or diphenylamine was not detected in all kinds of 19 fishes.

• Bulletin of the Korean Chemical Society
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• 제3권2호
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• pp.76-78
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• 1982

Ethanolic tetracarbonylhydridoferrate solution combined with glutaraldehyde is a very effective reducing agent for the selective transformation of two moles of secondary amines into pentane-1,5-diamine derivatives. A variety of aliphatic secondary amines react with ferrate-glutaraldehyde at room temperature under carbon monoxide to give the corresponding N-substituted pentane-1,5-diamines in reasonable yields.

• 한국군사과학기술학회지
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• 제20권6호
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• pp.781-787
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• 2017

A new method for synthesizing the tetrazole derivatives from secondary amines through cyanation/tetrazolation has been developed. Trichloroacetonitrile is used as the cyano source to synthesize N-nitrile instead of highly toxic and expensive cyanogen bromide. In this protocol, the reaction of secondary amines with various substituents proceed smoothly, and the desired tetrazole derivatives are obtained directly in fair to high yields without isolation of intermediate cyanamides.

• 약학회지
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• 제35권3호
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• pp.182-189
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• 1991

Systematic study on the extraction of ion pair by the use of picric acid (PCA) as an ion pair forming reagent to the aliphatic amines has not be done by spectrophotometric method. The extraction of ion pair by the use of PCA and 23 kinds of the aliphatic amines was examined. The procedure is as follows; Elving's buffer solution (pH 1.3~10, ionic strength 0.5) each amine solution, and PCA solution were taken into a test tube. The mixture was shaken mechanically with chlorform. The organic phase was filtered through a filter paper to remove water droplets. The absorbance was examined at $\lambda_{max}$ against a reagent blank. Primary and secondary whose carbon number were more than 7 or 6, respectively, are extractable as ion pairs with PCA, while tertiary amines and quaternary ammonium salts are also extractable without the correlation of carbon number. It was considered that the ion pair extraction of primary and secondary amines was affected by the number of carbon of amines, but its extraction of tertiary amines or quaternary ammonium salts was affected by kind of aliphatic amines rather than pKa values or carbon number of amines.

• 대한화학회지
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• 제47권4호
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• pp.412-416
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• 2003

• Bulletin of the Korean Chemical Society
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• 제24권5호
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• pp.638-640
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• 2003

• Bulletin of the Korean Chemical Society
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• 제33권7호
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• pp.2251-2254
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• 2012

A rapid and practical green route for N-formylation of primary and secondary amines with formic acid at room temperature under the solvent-free conditions using HEU zeolite as a heterogeneous, reusable and highly efficient catalyst is described. The process is remarkably simple and environmentally benign. Excellent chemoselectivity was observed for the conversion of primary amines in the presence of secondary amines.

• Bulletin of the Korean Chemical Society
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• 제25권3호
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• pp.420-422
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• 2004

• 한국식품과학회지
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• 제11권1호
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• pp.32-41
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• 1979

재래식(在來式) 간장에 있어서 2급(級) amine의 생성요인(生成要因)을 구명(究明)하고저 메주에서부터 간장의 숙성(熟成) 및 달이기까지의 전과정(全過程)에 걸쳐 2급(級) amine의 동태(動態)를 조사(調査)하였던바 다음과 같은 결과(結果)를 얻었다. 1. 일반가정(一般家庭)의 재래식(在來式) 메주는 Aspergillus oryzae를 인공접종(人工接種)하여 제조(製造)한 메주보다 2급(級) amine의 함량(含量)이 7배이상(倍以上) 높아서 평균(平均) 20.86 ppm이 검출(檢出)되었다. 또한 재래식(在來式) 메주중(中)에서도 변패도(變敗度)가 높은 메주일수록 2급(級) amine의 함량(含量)이 높았다. 2. 장류제조(醬類製造)의 원료(原料)인 콩, 밀, 쌀 및 보리에서도 소량(少量)의 2급(級) amine이 검출(檢出)되었는데 콩 1.28ppm, 밀 0.57ppm, 쌀 0.35ppm, 보리 0.34ppm이었다. 이들을 원료(原料)로 제조(製造)한 코오지에서는 보다 많은 양(量)의 2급(級) amine이 검출(檢出)되어 콩코오지는 2.63ppm, 밀은 1.09ppm, 쌀과 보리는 0.54, 0.64 ppm 수준(水準)이었다. 3. 재래식(在來式) 간장의 90일간(日間)의 숙성과정(熟成過程)에서 정상적(正常的)인 발효(醱酵)가 진행(進行)되는한 메주에서 유래(由來)하는 외(外)에 새로운 2급(級) amine의 생성(生成)은 없었다. 4. 재래식(在來式) 메주를 사용(使用), 식염농도(食鹽濃度)를 $12{\sim}26%$수준(水準)으로 간장을 담그었던바 일광(日光)을 충분(充分)이 쪼이는 조건(條件)에서는 2급(級) amine의 생성(生成)이 없었으나 암소(暗所)에서는 18%이하구(以下區)에서 메주로부터의 용출예상량이상(溶出豫想量以上)의 2급(級) amine이 검출(檢出)되었다. 5. Aspergillus oryzae를 인공접종(人工接種)하여 메주를 만들고 식염농도(食鹽濃度)를 $14{\sim}26%$수준(水準)으로 간장을 담그어 일광(日光)이 충분(充分)히 쪼이는 곳에서 숙성(熟成)시켰던 바 용출예상량이상(溶出豫想量以上)의 2급(級) amine이 검출(檢出)되지 않았다. 6. 메주의 건조(乾燥)나 간장 달이기에 의(依)한 2급(級) amine의 휘산효과(揮散效果)는 기대(期待)할 수 없었다.

• Bulletin of the Korean Chemical Society
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• 제18권5호
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• pp.523-527
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• 1997

Apparent second-order rate constants (kapp) have been measured spectrophotometrically for the reaction of 2,4-dinitrophenyl benzoate (DNPB) with 6 secondary cyclic amines in H2O containing 20 mole% DMSO at 25.0±0.1 ℃. The Bronsted-type plot (log kapp vs. pKa) shows a break at pKa near 9.1, e.g. two straight lines with βapp values of 0.67 and 0.44 for the low basic (pKa < 9.1) and the highly basic (pKa > 9.1) amines, respectively. Using an estimated k2 value of 3×109 sec-1, all the other microconstants (k1, k-1 and K) involved in the present aminolysis have been calculated. The k value decreases with increasing the basicity of amines while k1 and K values increase with increasing the amine basicity, as expected. Good linear Bronsted-type plots have been obtained for these microconstants of the present aminolysis of DNPB. The magnitudes of the slope of the Bronsted-type plots, k1 and k-1 have been calculated to be 0.43 and - 0.24, respectively, indicating the k-1 step is about two folds less sensitive than the k1 step to the amine basicity. The K value has been calculated to be 0.66, which appears to be much smaller than the one for other aminolyses showing general base catalysis. The small K value has been attributed to the absence of general base catalysis in the present aminolysis of DNPB.