Abstract:
An effective protocol has been developed for the construction of 3,3-disubstituted indol-2-ones from isatylidenes by utilizing amphiphilic bis-pi-allylpalladium and related intermediates. The developed strategy is a new method for the quaternization of position 3 of the indol-2-one towards disubstituted functionalized indol-2-ones. These products were subjected to ring-closing metathesis towards the synthesis of spiro[cyclohexene-1,3 '-indol]-2 '-ones and spiro[oxep-5-ene-2,3 '-indol]-2 '-ones, which are of biological interest.
