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.
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.