The present invention relates to voltage-gated sodium channel blocker intermediates, compounds and dimers, corresponding pharmaceutical compositions, compound preparation and treatment methods for respiratory or respiratory tract diseases.
A catalytic dearomative three-componentreaction of bromoarenes with TMS-diazomethane and allyl borate was developed. The key of this assembling reaction is the use of a diazocompound to generate a Pd-π-benzyl intermediate through a Pd-carbene species. This method allowed for a dearomative functionalization, using arenes as limiting reagents. Heteroaryl bromides were also applicable to give dearomatized