A Novel Pentannulation Sequence. Facile Access to Key Intermediates for the Synthesis of<i>Exaltone</i>® and Muscone
作者:Charles Fehr
DOI:10.1002/hlca.19830660817
日期:1983.12.14
Treatment of the sulfonyl ketones 1a and 1b with potassium t-butoxide in toluene or with potassium hydroxide in toluene/dimethyl sulfoxide affords in high yield the bicyclic dienes 3a and 3b, important precursors for Exaltone® and (±)-muscone. An application of this novel pentannulation sequence is demonstrated for the sulfonyl ketones 6, 10, and 14. An intermolecular variant is exemplified by the