Abstract
The intramolecular coupling reactions at the C-1 position of the 10Z-farnesyl moiety appended at the 2′-position of 4′-methoxy phenol derivatives were examined with the aid of Hf(OTf) 4 and LiClO 4. When the phenol was protected with a TBDMS group, meta coupling predominated while para coupling occurred efficiently when protected with a pivaloyl group. The para-coupled product was transformed to longithorone B, recently isolated from a tunicate.
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