3-Amino-5-methyl-thiophene-2-carboxylic acid methyl ester → 5-Methyl-3-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-thiophene-2-carboxylic acid methyl ester

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The title compound was prepared in an analogous manner as 3-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-thiophene-2-carboxylic acid methyl ester using methyl 3-amino-5-methylthiophene-2-carboxylate instead of methyl 3-amino-2-thiophenecarboxylate and obtained in 45% yield (HPLC: 99%, RT: 6.89 min). 1H NMR (DMSO-d6) 12.40 (br s, 1H), 10.58 (br s, 1H), 8.44 (s, 1H), 7.96 (br s, 1H), 7.47 (dd, J=3.1, 2.6 Hz, 1H), 6.63 (dd, J=3.3, 1.5 Hz, 1H), 3.82 (s, 3H), 2.55 (s, 3H); MS (m/z) 289 [M+H]+.

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