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진명종,Young-Mok Kim 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.2
Asymmetric metal catalysis is now recognized as the most promising area in the synthesis of optically active organic compounds. One attractive method that leads to the formation of optically active secondary alcohols is catalytic enantioselective addition of organozinc reagent to aldehyde.1 Numerous elegant and efficient catalysts have been develop- ed for this reaction, in which most of them are based on protic chiral ligands such as amino alcohols,2 diols,3 di- amines,4 and their derivatives.5 Although amino thioacetates 2 have been used with success for the diethylzinc-aldehyde addition, aprotic ligands have not received much attention in this area.6 Thus, it should be of interest to explore the catalytic ability of aprotic ligands. We present new chiral N,S-chelate aprotic ligands 3, together with their catalytic applicability in the diethylzinc-aldehyde addition.
Tricarbonyl(2-methyl-1-phenylpentadienyl)iron(+1) 양이온의 반응성
진명종,최흥식,Jin, Myung Jong,Choi, Heung Sik 대한화학회 1995 대한화학회지 Vol.39 No.1
Tricarbonyl(2-methyl-1-phenylpentadienyl)iron(+1) hexafluorophosphate 양이온이 hexafluorophosphoric acid를 사용한 tricarbonyl(4-methyl-5-hexadien-1-ol)iron의 양성자 첨가반응에 의해 얻어졌다. 그 양이온과 $H_2o$, dimethyl cuprate, diphenylacetylenyl cuprate, 그리고 cyclohexanone의 enolate와의 반응은 그것들에 대응하는 (η4-1,3-diene)Fe(CO)3를 형성시켰다. 친핵체의 공격에 있어서의 위치 선택성은 주로 입체효과의 결과인 것으로 보인다. Tricarbonyl(2-methyl-1-phenylpentadienyl)iron(+1) hexafluorophosphate cation was prepared by the protonation of tricarbonyl(4-methyl-5-hexadien-1-ol)iron wit hexafluorophosphoric acid. Reaction of the cation with water, dimethyl cuprate, diphenylacetylenyl cuprate, and enolate of cyclohexanone gave the corresponding (η4-1,3-diene)Fe(CO)3. The regioselectivity for the nucleophilic attack appears to the predominantly the result of steric effect.
Polymer - bound Phenothiazine 양이온 라디칼의 합성
진명종,김상한 ( Myung Jong Jin,Sang Han Kim ) 한국공업화학회 1995 공업화학 Vol.6 No.2
Phenothiazine actinium hexachloroantimonate 양이온 라디칼이 불용성 폴리머체에 정량적으로 접합되어졌다. 그 폴리머 양이온 라디칼은 쉽게 [C_5H_5Fe(CO)₂]₂내의 금속결합을 끊을 수 있다는 것과 Bu₄NPF_6 와 음이온 교환하여 합성에 더 유용한 phenothiazine aminium hexafluorophosphate로 전환될 수 있음을 알 수 있었다. Phenothiazine aminium hexachloroantimonate was quantitatively incorporated into insoluble cross-linked polystyrene framework. The polymer cation radical was found to readily cleave metal-metal bond in [C_5H_5Fe(CO)₂]₂ as an effective one-electron oxidant and undergo anion exchange with Bu₄NPF_6 to convert a more synthetically useful phenothiazine aminium hexafluorophosphate.