Catalytic Asymmetric Synthesis of a Potent Thiomarinol Antibiotic
- 25 January 2005
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 127 (6), 1628-1629
- https://doi.org/10.1021/ja042827p
Abstract
Thiomarinols, isolated from the bacterium Alteromonas rava sp. nov. SANK 73390, are potent marine antibiotics that possess both Gram-positive and Gram-negative activity. The first total synthesis of a member of the thiomarinol class of marine antibiotics was achieved in a remarkable global yield of 22% (from 3-boronoacrolein pinacolate). The highlight of this synthesis is the efficient catalytic enantio-, regio-, E/Z-, and diastereoselective three-component inverse electron demand Diels-Alder/allylboration sequence. This key operation provides a rare example of an enantioselective HDA reaction involving acyclic 2-substituted enol ethers, and it featured an unusual but fortuitous kinetic selection that favored the requisite Z-dienophile.Keywords
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