The palladium coupling of acid chlorides with unsymmetrical organotin reagents R” 3SnR'can be carried out in chloroform under mild conditions in high yields to give the ketone RCOR'in which only one of the four organic groups on tin appears in the ketone product. Alkyl partners (R'= methyl or butyl) on tin serve as anchoring groups and do not transfer. When R'is acetylenic, vinyl, aryl, methoxymethylene, allyl, or benzyl, transmetalation takes ...