A utility for organoleads: selective alkyl and aryl group transfer to tin

Me 4 Pb and Ph 4 Pb readily transfer methyl or phenyl groups to an equivalent molar ratio of tin( iv ) chlorides in the order SnCl 4 > MeSnCl 3 > Me 2 SnCl 2 > Me 3 SnCl, often in a selective manner. Me 3 PbCl and Ph 3 PbCl specifically transfer a single methyl/phenyl group under the same reaction conditions to produce recovered yields in >75%. Specific transfer of 2 methyl groups from PbMe 4 can be achieved at elevated temperatures and/or a 2 : 1 molar ratio Pb : Sn. Me 4 Pb and Ph 4 Pb readily transfer methyl or phenyl groups to an equivalent molar ratio of tin( iv ) chlorides in the order SnCl 4 > MeSnCl 3 > Me 2 SnCl 2 > Me 3 SnCl, often in a selective manner.