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Ring-Opening Reaction of 2,2-gem-Diphenylaziridine
한치선,남궁하일,강용익,Hahn, Chi-Sun,Nam-Goong, Ha-Il,Kang, Yong-Ik Korean Chemical Society 1969 대한화학회지 Vol.13 No.3
2,2-gem-dephenylaziridine의 醋酸에 의한 開環反應에서 反應生成物은1,1-diphenyl-2-amino-ethyl acetate 임을 알았다. 또한 이 開環反應은 aziridine環 안에 있는 窒素原子와 tertiary炭素原子사이의 結合이 切斷되어 中間體로서 carbonium이온이 形成되는 過程을 거쳐서 進行됨을 알았다. A study of the ring-opening reaction of 2,2-gem-diphenylaziridine by treating with acetic acid has been undertaken. The structure of the ring-opened product was confirmed as 1,1-diphenyl-2-aminoethyl acetate. It is most likely that the reaction proceeds through the cleavage of a bond between nitrogen and tertiary carbon atoms in the aziridine ring, followed by the formation of a carbonium ion intermediate.
Syntheses of Metallic Monoazo Complexes
한치선,박대철,남궁하일,강용익,Hahn, Chi-Sun,Park, Dae-Chul,Nam-Goong, Ha-Il,Kang, Yong-Ik Korean Chemical Society 1968 대한화학회지 Vol.12 No.3
몇가지 ortho-hydroxy monoazo 化合物들을 合成하여 이것들을 遷移元素로 金屬化시켰다. 三酸化크롬, 酢酸銅 및 酢酸코발드를 이 金屬錯鹽生成反應에 使用하였다. 이 硏究에서 다음과 같은 事實들을 알 수 있었다. (1) 이 金屬錯鹽生成反應에서의 溶媒는 다른 여러가지 有機溶媒보다는 물이 가장 좋고, (2) 金屬錯鹽生成反應 混合液의 가장 適當한 液性은 pH=4.5~5.5程度 이었으며, (3) 이들 monoazo 金屬錯鹽의 물에 대한 溶解性은 主로 그 錯鹽의 組成에 달렸으나 어느 程度는 分子內의 黃酸基의 存在에 의하여서도 影響을 받는다. 그리고 (4) 分子當 두개의 ortho-hydroxy基를 가진 金屬錯鹽이 더 强한 結合能을 가지고 있다. Some ortho-hydroxy monoazo-compounds have been synthesized and these were metallized with transition elements. Chromium trioxide, cupric acetate and cobalt acetate were used for the metallization. The following facts have been found in this investigation: (1) water is the best solvent, when compared to various organic solvents, for the metallization, (2) the optimum pH for the metallizing mixture ranges from 4.5 to 5.5, (3) the solubility of these metallic monoazo-compounds in water depends mainly on the composition of the complexes and to some extent on the presence of sulfonic acid groups in the molecules, and (4) metallized compounds having two ortho-hydroxy groups per molecule have stronger binding characteristics.
김욱환(Wook Hwan Kim),명나혜(Na Hye Myeong),강용익(Yong Ik Kang),권수인(Soo In Kwon) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.1
Hepatoblastoma is the most common prirnary malignancy of the liver in children, occurring rnost frequently in infant younger than 2 years of age, however, massive hemoperitoneurn caused by spontaneous rupture of a hepatoblastoma is rare. Authours experienced a case of hemoperitoneum caused by spontaneous rupture of hepatoblastoma in a 42 month old male patient, who complained of abdominal pain.(Korean J Gastroentero11994; 26: 197 199)