Triphenylphosphine → (R)-methyl 1-(1-(4-fluorophenyl)ethyl)-6-methyl-4-(p-tolyl)-1H-pyrrolo[2,3-b]pyridine-5-carboxylate

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A suspension of methyl 6-methyl-4-(p-tolyl)-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (117 mg, 0.417 mmol) (Example 1, Step F) and triphenylphosphine (175 mg, 0.668 mmol) in tetrahydrofuran (THF) (3960 μl) under N2 was treated with (S)-1-(4-fluorophenyl)ethanol (84 μl, 0.668 mmol), heated to 65° C., and treated with DIAD (130 μl, 0.668 mmol). After stirring for 30 min, the reaction was cooled to rt, then concentrated. Purification with column chromatography (0-100% EtOAc/Hexane) afforded (R)-methyl 1-(1-(4-fluorophenyl)ethyl)-6-methyl-4-(p-tolyl)-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (18.6 mg, 0.046 mmol, 11.07% yield) as pale yellow oil. 1H NMR (400 MHz, CHLOROFORM-d) δ=7.37 (d, J=8.1 Hz, 2 H), 7.32-7.18 (m, 4 H), 7.14 (d, J=3.7 Hz, 1 H), 7.03-6.94 (m, 2 H), 6.40-6.28 (m, 2 H), 3.62 (s, 3 H), 2.68 (s, 3 H), 2.41 (s, 3 H), 1.88 (d, J=7.2 Hz, 3 H); LCMS (m/z) ES+=403 (M+1).

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