서지주요정보
1. Total synthesis of quadronoids through radical cyclization 2. total synthesis of (+) jujuyane through [5+3] cycloaddition reaction = 1. 라디칼 고리화반응을 이용한 쿼아드로노이드의 전합성 2. [5+3] 고리화 첨가반응을 이용한 주주에인의 전합성
서명 / 저자 1. Total synthesis of quadronoids through radical cyclization 2. total synthesis of (+) jujuyane through [5+3] cycloaddition reaction = 1. 라디칼 고리화반응을 이용한 쿼아드로노이드의 전합성 2. [5+3] 고리화 첨가반응을 이용한 주주에인의 전합성 / Byung-Gyu Kim.
저자명 Kim, Byung-Gyu ; 김병규
발행사항 [대전 : 한국과학기술원, 2001].
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등록번호

8012215

소장위치/청구기호

학술문화관(문화관) 보존서고

DCH 01007

SMS전송

도서상태

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초록정보

Development of new synthetic methodologies and their application to the total synthesis of natural products were studied. In the first part, core ring skeleton of Quadronoids was synthesized through tandem radical reaction sequence, which invloved the cyclopropyl methyl radical medicated rearrangement. This reaction was used as the key step in the total synthesis of Suberosenone and a formal total synthesis of Quadrone. Enediyne 137, prepared from β-keto ester 126, undergo tributyltin mediated radical reaction to form $[4.3.2.0 ^{1,5}]$ undecane 138. The resulting undecane 138 was converted to Suberosenone and Quadrone through manipulation of functional groups of A and C rings and stereoselective introduction of C-1 unit via 1,4-addition at C-9 position. A noteworthy aspect of this synthesis is one-pot construction of tricyclic ring system of Quadronoids. In the second part, new synthetic methodology for the construction of cyclooctanoids is developed. 3-oxidopyrylium ion, prepared from commercially available furfuryl alcohol, was used for this purpose. Thermal [5+3] cycloaddition reaction of 3-oxidopyrylium ion produced highly functionalized dimer 339, which contained eight-membered ring. This dimer was converted to ketone 355 via 6 steps. Kinetic resolution of ketone was accomplished through adductive formation with (+)-(S)-N,S-dimethyl-S-Phenylsulfoximine, separation and thermolysis of the adduct to regenerate resolved 355. In the advantage of conformational rigidity, (-)-355 was transformed to cyclooctane (-)-364 through stereocontrolled introduction of proper alkyl groups and opening of ether bridge. Stereoselective conversion of exo olefin to methyl group was accomplished by titanium mediated epoxide opening. Total synthesis of (+) Jujuyane was completed from cyclooctanoid (-) 379 via straightforward manners

서지기타정보

서지기타정보
청구기호 {DCH 01007
형태사항 iv, 213 p. : 삽도 ; 26 cm
언어 영어
일반주기 저자명의 한글표기 : 김병규
지도교수의 영문표기 : Hee-Yoon Lee
지도교수의 한글표기 : 이희윤
학위논문 학위논문(박사) - 한국과학기술원 : 화학과,
서지주기 Reference : p. 206-213
주제 Radical Cyclization
Quadronoids
[5+3] Cycloaddition Reaction
Jujuyane
Total Synthesis
라디칼 고리화 반응
쿼아드로노이드
[5+3] 고리화 첨가반응
주주에인
전합성
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