(S)-1-Boc-3-methylpiperazine → 4-[3-(2-Chloro-pyrimidin-4-yl)-benzyl]-3-(S)-methyl-piperazine-1-carboxylic acid tert-butyl ester

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Intermediate 1 was coupled with 4-boc-2-(S)-methyl-piperazine following procedure B. LC-MS showed the product had the expected M+H+ of 403. 1H NMR (Varian 300 MHz, CDCl3, shifts relative to the solvent peak at 7.24 ppm) δ 8.6 (d, 1H) 8.0 (m, 2H) 7.6 (d, 1H) 7.5 (m, 2H) 4.8 (d, 1H) 4.1 (m, 1H) 3.6 (m, 2H) 3.3 (m, 1H) 3.0 (m, 2H) 2.5 (m, 2H) 1.4 (s, 9H) 1.1 (m, 3H).

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