A Total Synthesis of the Racemic Sesquiterpene Parvifoline
摘要:
A total synthesis of the sesquiterpene (+/-)-parvifoline 1 from the symmetrical naphthalene 4 is reported. The key step of the synthesis was a Stork-Landesman two-carbon ring expansion of beta-tetralone 5, which affords 9a with the complete framework of the target. Although many reactions are involved in the sequence, the whole synthesis can be executed in only five synthetic operations and in approximate to 18% overall yield.