Synthesis of Pulvinic Acid and Norbadione A Analogues by Suzuki–Miyaura Cross‐Coupling of Benzylated Intermediates

Pulvinic acid and norbadione A analogues can be prepared by Suzuki–Miyaura cross‐coupling of functionalized arylboronic esters with appropriate vinyl triflates, in which the hydroxy functions are protected either with methyl or benzyl groups, the latter being cleaved in a more reliable fashion at the end of the synthetic sequence. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)