Stereoselective Total Synthesis of Ieodomycins A and B and Revision of the NMR Spectroscopic Data of Ieodomycin B
作者:Sayantan Das、Rajib Kumar Goswami
DOI:10.1021/jo400929m
日期:2013.7.19
Stereoselective total synthesis of antimicrobial marine metabolites ieodomycin A and B have been accomplished starting from commercially available 4-pentyn-1-ol featuring strategic application of the Negishi reaction, Kumada coupling, and Crimmins acetate aldol. This revises the proton NMR spectra of ieodomycin B.
Stereo-controlled total syntheses of ieodomycins A and B using d-glucose based chiral pool approach
作者:Videsh T. Salunkhe、Sandeep Bhosale、Prasad Punde、Debnath Bhuniya、Summon Koul
DOI:10.1016/j.tetlet.2013.03.002
日期:2013.5
The first stereo-controlled totalsyntheses of ieodomycins A and B have been accomplished in 15 steps using the chiral pool approach starting from d-glucose. The key features of this synthetic strategy are Wittig olefination, indium catalyzed Barbier reaction, and Martin sulfurane catalyzed dehydration to achieve preferential formation of the desired E isomer.
Protection-free, short, and stereoselective synthesis of ieodomycin A and B
作者:N. Nageswara Rao、H.M. Meshram
DOI:10.1016/j.tetlet.2013.06.071
日期:2013.8
A concise, protection-free, and improved stereoselective total synthesis of ieodomycin A and ieodomycin B is described. The key steps involved in the synthesis are Evans aldol reaction and nucleophilic addition of potassium salt of mono methyl malonate. (C) 2013 Elsevier Ltd. All rights reserved.
Stereoselective total synthesis of Ieodomycin A and B
The stereoselective total synthesis of Ieodomycin A and B, bioactive secondary metabolites from marine sources with potent anti-microbial activity was achieved starting from commercially available geranial. The key steps involved in the synthetic sequence of Ieodomycin A and B are the Sharpless asymmetric epoxidation, the formation of a beta-ketoester, and the 1,3-anti reduction. The synthesis of C-3 epimer of Ieodomycin A and B was also accomplished in good yields. (C) 2013 Elsevier Ltd. All rights reserved.
Ieodomycins A–D, Antimicrobial Fatty Acids from a Marine <i>Bacillus</i> sp.
Bioassay-guided isolation of the EtOAc extract of a marine Bacillus sp., cultured in modified Bennett's broth medium, yielded four new antimicrobial fatty acids, named ieodomycins A-D (1-4). The planar structures of these new compounds were determined by extensive 1D and 2D NMR and HRESIMS spectroscopic data analysis. Their absolute configurations were elucidated by modified Mosher's method and literature data review. All four new compounds (1-4) demonstrated antimicrobial activities in vitro.