J. Kraxner et al., Traceless linking of indoles: General methodology and application to solidphase supported Mannich and Stille reactions, SYNLETT, (1), 2000, pp. 125-127
Transacetalization reaction of the diethoxymethyl (DEM) protected indoles 2
a,b,d,e with the polymer bound glycerol derivative 3 resulted in formation
of the immobilized indoles 4a,b,d,e. Selective indole-functionalizations as
well as quantitative and traceless cleavage could be demonstrated.