Triethylamine → HCID 86668000, compound

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Reaction Steps

To a mixture of the product of Example 74, step E (300 mg, 0.78 mmol) in dichloromethane (4 mL) at 0° C. was added triethylamine (93 mg, 0.92 mmol) followed by methanesulfonyl chloride (100 mg, 0.88 mmol). The reaction mixture was allowed to warm to ambient temperature over 2 h, then treated with saturated sodium bicarbonate solution and extracted with dichloromethane. The organic extracts were dried over sodium sulphate, filtered, and concentrated in vacuo. Purification by flash chromatography (SiO2, 95:5 hexanes/ethyl acetate) provided tert-butyl 8-bromo-6-((methylsulfonyloxy)methyl)-3,4-dihydrobenzofuro[3,2-c]pyridine-2(1H)-carboxylate (340 mg, 94%) as a yellow solid: 1H NMR (CDCl3, 300 MHz) δ 7.59 (s, 1H), 7.44 (s, 1H), 5.47 (s, 2H), 4.52 (s, 2H), 3.83 (t, J=5.1 Hz, 2H), 3.02 (s, 3H), 2.88 (s, 2H), 1.51 (s, 9H).

Provenance & Evidence