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이천수,Chun-Soo Lee 대한화학회 1981 대한화학회지 Vol.25 No.1
L-Glutamic acid와 aniline 誘導體로부터 다음과 같은 새로운 pyrrolidone-anilide誘導體를 合成했다. 이 化合物들의 構造가 元素分析, UV, IR, NMR 그리고 Mass 스펙트럼으로 (R)-2-pyrrolidone-5-carbox-p-chloroanilide, (R)-2-pyrrolidone-5-carbox-o-toluidide, (R)-2-pyrrolidone-5-carbox-m-toluidide, (R)-2-pyrrolidone-5-carbox-p-toluidide임이 확인되었다. 이 化合物들의 무우, 벼 種子發芽와 生育에 대한 phytotoxicity을 調査한 結果는 다음과 같다. 이 化合物들은 벼 種子에 대하여 發芽 및 發根抑制?果를 나타내었다. 그 중에서 (R)-2-pyrrolidone-5-carboxanilide와 (R)-2-pyrrolidone-5-carbox-p-chloroanilide 誘導體는 무우 種子의 發芽와 生育을 현저하게 抑制하였다. 또한 (R)-2-pyrrolidone-5-carboxtoluidide 誘導體에 있어서 methyl group의 結合位置 (ortho, meta, para)에 따라서 무우의 生育抑制率이 다르다는 것을 알았다. 즉 (R)-2-pyrrolidone-5-carbox-m-toluidide는 (R)-2-pyrrolidone-5-carbox-o-toluidide와 (R)-2-pyrrolidone-5-carbox-p-toluidide 보다 무우 種子의 生育阻害現象이 현저하였다. Pyrrolidone-anilide derivatives from L-glutamic acid and anilines were synthesized as follows: The products were identified by elementary analysis, IR, NMR and Mass spectra with (R)-2-pyrrolidone-5-carbox-anilide, (R)-2-pyrrolidone-5-cabox-p-chloroanilide, (R)-2-pyrrolidone-5-carbox-o-toluidide, (R)-2-pyrrolidone-5-carbox-m-toluidide and (R)-2-pyrrolidone-5-carbox-p-toluidide. The products were testes for their phytotoxicity on the germination and the seedling growth of radish and rice plants. Among them, (R)-2-pyrrolidone-5-carbox-anilide and (R)-2-pyrrolidone-5-carbox-p-chloroanilide derivatives were strongly inhibitory especially on the germination and the seedling growth of radish seeds. All the compounds also showed an inhibitory activity upon the germination of rice seeds. Additionally, the inhibiting rate of radish growth differs according to the isomeric position(ortho, meta and para) of the methyl group; (R)-2-pyrrolidone-5-carbox-m-toluidide derivative was more effective than both (R)-2-pyrrolidone-5-carbox-o-toluidide and (R)-2-pyrrolidone-5-carbox-p-toluidide derivatives.
이천수,윤무홍,최석범,노승백 ( Chun Soo Lee,Mu Hong Yoon,Seok Burm Choe,Seung Baik Rho ) 한국공업화학회 1992 공업화학 Vol.3 No.1
수용액에서 amine류와 arylsulfonyl carbamate류를 반응시켜 다음과 같은 arylsulfonyl urea유도체들을 좋은 수율로 쉽게 합성할 수 있다 : 1) N-Arylsulfonyl-N`-arylurea 유도체, 2) N-Arylsulfonyl-N`-alkyl urea 유도체, 3) N-Arylsulfonyl-N`-heterocyclic urea 유도체. Arylsulfonyl urea의 합성에 관한 반응메카니즘은, 먼저 산-염기 반응에 의해 ion-pair형태가 만들어지고, 그 다음 사면체형 중간체를 형성하는 친핵성첨가반응, 그리고 산촉매애 의한 alkoxide ion 과 양성자의 제거반응에 따라 일어난다. Arylsulfonyl urea derivatives can be easily prepared in good yield by treating amines with arylsulfonyl carbamates in aqueous solution : 1) N-Arylsulfonyl-N`-aryl urea derivatives, 2) N-Arylsulfony-N`-alkyl urea derivatives, 3) N-Arylsulfonyl-N`-heterocyclic urea derivatives. The proposed reaction mechanisms for preparing arylsulfonyl ureas involve formation of an ion-pair conformation by initial acid-base reaction, then formation of a so-called tetrahedral intermediate by nucleophilic addition, followed by an acid-catalyzed elimination of an alkoxide ion and loss of a proton.
Chemical Modification of Some Natural Polymers for Controlled-Release Pesticides
李千洙 계명대출판부 1979 童山申泰植博士古稀紀念論叢 Vol.S No.-
The rate of their combination is calculated from the content of nitrogen and the intensity of the characteristic IR absorption. After methanolysis, triazinylated monosaccharides were isolated and identified with authentic derivatives. Following new s-triazine derivatives were synthesized from uronic acids for the first time: 5(R)-(2-amino-4-dimethylamino-1, 3, 5-triazin-6'--yl) -L-arabopyranose CI) and methyl 5(R)-(2-amino-4-dimethylamino 1, 3, 5-triazin-6-yl)-ß-Larabopyranoside (H) from galacturonic acid, 5(R)-(2-amino-4-dimethylamino- 1, 3, 5-triazin-6-yl)-ß-D-xylopyranose (II[) from glucuronolactone. and methyl .5(R) -(2-amino-4-dimethy lamino-l, 3, 5-triazin -6-y 1) -α-D-Iyxopyranoside crn ttrom mannuronoIactone respectively. Although no remarkable biological activity was found get with these modified : natural polymers, it might be expected to be found by proper bioassay methods. By further research in this field, the combinations of pesticidal components -with polymeric substances would be expected to give more effective agents .against pests or weeds, and might contribute to diminution of environmental pollution by agricultural chemicals.
Synthesis and Properties of Diethyl α-cyanovinylphosphonate and Dialkyl carboethoxyvinylphosphonates
이천수,Denney, Donald B. 계명대학교 산업기술연구소 1985 産業技術硏究所 論文報告集 Vol.7 No.-
Dialkyl α-substituted methylenephosphonate와 paraformaldehyde로부터 Dialkyl α-substituted vinyphosphonate 유도체들을 합성했다. 이화합물들의 구조가 IR. ¹H-, ?C- 그리고 ?P-NMR스펙트럼으로부터 diethyl α-cyanovinylphosphonate(Ⅲ), dimethyl carboethoxyvinyphosphonate(Ⅳa) 그리고 dimethyl carboethoxyvinyphosphonatev(Ⅳb)임이 확인되었다. α-substituted methylenephosphonate와 formaldehyde의 반응 mechamism은 methanol, piperidine 그리고 acetic acid 존재하에서 부가 및 제거 반응으로 이루어지고 있다. Dialkyl α-substituted vinyphosphonate derivatives from dialkyl α-substituted methylenephosphonate and paraformaldehyde were synthesized. The products were identified by IR. ¹H-, ?C- and ?P-NMR spectra with diethyl α-cyanovinylphosphonate(Ⅲ), dimethyl arboethoxyvinyphosphonate(Ⅳa) and dimethyl carboethoxyvinyphosphonate(Ⅳb). The mechanism of the reaction of formaldehyde with α-subtituted methylenephosphonate in the presence of methanol, piperidine and acetic acid, probably involves both additional and eleminational reaction.
李千洙,金鍾奎,奇宇京,成洛癸 慶尙大學校 1972 論文集 Vol.11 No.-
고구마 軟腐病所에서 分離한 細菌 ??가 生産하는 酵素中에서 macerating acton을 하는 酵素를 究明하기 위한 資料로 쓰기 위해 macerating enzyme의 生成에 미치는 pectin의 影響과 生成한 macerating enzyme와 pectolytic enzymes의 一般전 性質을 조사한 결과는 다음과 같다. 1. 細菌 ??는 酵素生成培地(wheat bran media)에 pectin을 加하므로써 macerating enzyme을 效果的으로 生産했다. 2. pectic acid liquefying activity, pectin liquefying activity, pectin esterase,와 macerating enzyme은 各各 1) 最適作用 pH가 7.2∼7.8, 7.2, 6.0, 6.5∼7.5 2) 最適作用溫度는 50℃, 50℃, 60℃, 50℃ 3) pH 安定性은 3.0∼8.0, 5.0∼8.0, 3.0∼8.0, 및 3.0∼8.0이었다. The influence of pectin on production of macerating enzyme by isolated bacterial ?? and the enzymological properties of its macerating enzyme produced and pectolytic enzymes were studed. The results obtained were summarized as follows: 1. Macerating enzyme was effectively produced in the media adding pectin. 2. The optimum pH of pectic acid liquefying activity, pectin liquefying activity, pectin esterase and macerating enzyme were 7.2∼7.8, 7.2, 6.0 and 6.5∼7.5 respectively. 3. The optimum temperature of pectic acid liquefying activity, pectin liquefying activity and macerating enzyme were 50℃., and that of pectin esterase was 60℃. 4. The pH stability of pectic acid liquefying activity, pectin esterase and macerating enzyme were 3.0∼8.0, and that of pectin liquefying activity was 5.0∼8.0.