The first enantioselective synthesis of a chamigrane sesquiterpene, (+)-majusculone, has been completed. The quaternary center was generated asymmetrically by alkylidene carbene insertion, with retention of absolute configuration, from a diastereomerically pure ketal.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3248824 | PMC |
http://dx.doi.org/10.1021/jo070257g | DOI Listing |
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