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[摘要]:A novel route to simple 6,5-benzannulated spiroketal analogues has been developed. A convergent Horner-Wadsworth-Emmons olefination enabled ready assembly of the spiroketal precursors. Use of a benzyl protecting group strategy enabled an efficient one-pot hydrogenation/deprotection/spiroketalisation process to be employed providing a robust method to access a range of substituted aromatic monobenzannulated spiroketals. |
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