Novel soluble polymer supported synthesis of 1,2,3,4-tetrahydro-β-carboline derivatives in the microwave oven is reported. Commercially available Fmoc-protected tryptophan was directly anchored to MeO-PEG-OH via an ester linkage in the presence of DCC and DMAP. One pot cyclocondensation of polymer-bound tryptophan with a variety of aldehydes and ketones has been carried out under microwave irradiation to provide immobilized 1,2,3,4-tetra-hydro-β-carboline derivatives. The desired products were then liberated from the soluble matrix in good yield and good purity.
- Combinatorial chemistry
- Liquid-phase method
- Microwave-assisted combinatorial synthesis