1-Methoxy-2-propanol → 2-[5-(2-Methoxy-1-methyl-ethoxy)-1-methyl-1H-indol-3-yl]-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine

Participants

Reaction Steps

A solution of triphenylphosphine (470 mg) and diisopropyldiazodicarboxylate (350 μl) in dry toluene (15 mL) was treated with 1-methyl-3-[1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridin-2-yl]-1H-indol-5-ol [150 mg, Reference Example 14(a)] followed by 1-methoxy-2-propanol (150 μl). The resulting mixture was heated under reflux for 5 hours then cooled and then evaporated. The residue was subjected to flash chromatography on silica eluting with a mixture of ethyl acetate and pentane (1:1, v/v) to give the title compound (50 mg) as a clear oil. TLC: RF=0.65 (pentane/ethyl acetate: 1/1). MS: 480 (MH+).

Provenance & Evidence