期刊
TETRAHEDRON LETTERS
卷 53, 期 44, 页码 5895-5898出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.08.092
关键词
E-Lucentamycin A; Olefin geometry; Reductive cyclization; Natural product; Chemical elucidation
资金
- Korea Institute of Science and Technology
- creative/challenging research program of National Research Foundation of Korea [2011-0028676]
- Ministry of Education, Science and Technology, Republic of Korea
- National Research Foundation of Korea [2011-0028676] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A synthesis of the E-isomer of the proposed structure of the novel tripeptide, lucentamycin A. was performed in an attempt to define the correct stereochemistry of this natural product. The synthetic route developed employs a stereoselective Rh-catalyzed reductive cyclization process to generate the key pyrrolidine residue in the target and a stereospecific inversion of the Z-olefin geometry to form desired E-isomer. Subsequent amide coupling reactions afforded the desired E-isomer of putative lucentamycin A. A comparison of the NMR data of synthetic E-la with that of the naturally occurring lucentamycin A demonstrated that they are not identical substances and the E-la was found to display no anti-proliferative activity on the colon cancer cell line HCT-116 in contrast to natural lucentamycin A. (C) 2012 Elsevier Ltd. All rights reserved.
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