Abstract
AbstractAlkoxy‐functionalized butadienylboronic esters have been synthesized starting from α,β‐unsaturated acetals and cross‐coupled with both N‐protected and N‐unprotected 2‐bromo‐ and 2‐iodoaniline, and with 2‐iodophenol. In particular, N‐tosyl‐protected dienylanilines can be transformed under mild conditions into quinolines and quinolinones, in the presence of a PdII catalyst. Moreover, the cross‐coupling reaction between butadienylboronic esters and iodophenol directly affords chromenes that can be successively transformed into chromenones. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
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