1-benzyl-4-(2,2-dimethyl-propionyloxy)-2,3-dimethyl-1H-pyrrolo[2,3-c]pyridine-5-carboxylic acid ethyl ester → 4-(2,2-Dimethyl-propionyloxy)-1,2,3-trimethyl-1H-pyrrolo[2,3-c]pyridine-5-carboxylic acid ethyl ester

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Prepared in analogy to that of 1-benzyl-4-(2,2-dimethyl-propionyloxy)-2,3-dimethyl-1H-pyrrolo[2,3-c]pyridine-5-carboxylic acid ethyl ester from 2,3-Dibromo-4-(2,2-dimethyl-propionyloxy)-1-methyl-1H-pyrrolo[2,3-c]pyridine-5-carboxylic acid ethyl ester. The title product, 1H NMR (200 MHz, CDCl3): δ (ppm)=8.53 (s, 3H), 4.42 (q, 2H, J=7.0 Hz), 3.76 (s, 3H), 2.34 (s, 3H), 2.29 (s, 3H), 1.46 (s, 9H), 1.41 (t, 3H, J=7.0 Hz).

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