5-(2-methyl-[1,3]dioxolan-2-ylmethyl)-1-(4-nitrobenzyl)-1H-indole-2-carboxylic acid ethyl ester → 1-(4-Amino-benzyl)-5-(2-methyl-[1,3]dioxolan-2-ylmethyl)-1H-indole-2-carboxylic Acid Ethyl Ester

Participants

Reaction Steps

A solution of crude 5-(2-methyl-[1,3]dioxolan-2-ylmethyl)-1-(4-nitrobenzyl)-1H-indole-2-carboxylic acid ethyl ester (2.4 g, ≈5 mmol) in dry tetrahydrofuran (20 ml) was shaken in a Parr apparatus with 10% palladium on carbon (200 mg) under 40 psi hydrogen for about four hours. The mixture was filtered and evaporated under reduced pressure to give the title compound (2.03 g), which was reacted without further purification.

Provenance & Evidence