Abstract
An enantioselective synthesis of the halogenated medium-ring ether natural product (+)-obtusenyne is reported which uses the ring expansion of a seven-membered ketene acetal by means of a Claisen rearrangement to construct the core nine-membered oxygen heterocycle. The trans substituents across the ether linkage were established by using a transition-metalcatalyzed intramolecular hydrosilation reaction of an exo-cyclic enol ether. In addition, a formal synthesis of ent-obtusenyne from 2-deoxy-D-ribose is reported. A number of interesting points regarding the chemistry of medium-ring oxygen heterocycles are highlighted.
| Original language | English |
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| Pages (from-to) | 2867-2885 |
| Number of pages | 19 |
| Journal | Chemistry - A European Journal |
| Volume | 14 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 17 Mar 2008 |