Total Synthesis of Ascospiroketal A Through a Ag
<sup>I</sup>
‐Promoted Cyclization Cascade
作者:Stanley Chang、Soo Hur、Robert Britton
DOI:10.1002/anie.201408905
日期:2015.1.2
The totalsynthesis of four candidate stereostructures for the marine octaketide ascospiroketal A have been achieved. These concise and highly stereocontrolled syntheses feature a unique AgI‐promotedcyclizationcascade involving an oxetanyl ketochlorohydrin to access the entire tricyclic core of the natural product in one step. These syntheses also establish the full stereochemistry for the ascospiroketal