Synthesis of (S)- and (R)-3-Hydroxy-4-butanolide and (2S,4S)-, (2R,4S)-, (2S,4R)-, and (2R,4R)-2-Hydroxy-4-hydroxymethyl-4-butanolide and Their Satiety and Hunger Modulating Activities
Synthesis of (S)- and (R)-3-Hydroxy-4-butanolide and (2S,4S)-, (2R,4S)-, (2S,4R)-, and (2R,4R)-2-Hydroxy-4-hydroxymethyl-4-butanolide and Their Satiety and Hunger Modulating Activities
Synthesis of a bifunctional 2,4-dihydroxy five-carbon synthon. Enantiomerically pure Δ2-isoxazolines by chromatographic resolution
作者:Calimero Ticozzi、Antonio Zanarotti
DOI:10.1016/0040-4039(94)85331-2
日期:1994.10
5-dihydro-3-phenyl-5-isoxazolemethanol in 100% ee. Reductive ring cleavage, diastereoselective reduction of the 3-hydroxy ketones thus obtained, and oxidation of the phenyl ring with RuO4 leads to the synthesis of enantiomericallypure 2,4,5-trihydroxypentanoic acids virtually in all the possible configurations.
Synthesis, Structure Determination, and Biological Evaluation of Destruxin E
作者:Masahito Yoshida、Hisayuki Takeuchi、Yoshitaka Ishida、Yoko Yashiroda、Minoru Yoshida、Motoki Takagi、Kazuo Shin-ya、Takayuki Doi
DOI:10.1021/ol101449x
日期:2010.9.3
The total synthesis of destruxinE (1) has been achieved for the first time, and the stereochemistry of its chiral center at the epoxide has been determined to be (S). The cyclization precursor 3a was synthesized by solid-phase peptide synthesis. Macrolactonization of 3a utilizing MNBA-DMAPO, followed by formation of the epoxide, then furnished destruxinE. Its diastereomer, epi-destruxin E (2), was