Sodium hydride → 4-Bromo-5-methoxy-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrrolo[2,3-c]pyridine

Participants

Reaction Conditions

Reaction Steps

To a suspension of NaH (0.238 g, 5.95 mmol, 1.3 eq, 60%) in THF at 0° C. was added a solution of 4-Bromo-5-methoxy-1H-pyrrolo[2,3-c]pyridine (1.05 g, 4.62 mmol) in THF and the solution stirred until no effervescence was observed (approx. 5 minutes). To the reaction mixture was added (2-Chloromethoxy-ethyl)-trimethyl-silane (1.00 mL, 5.64 mmol, 1.2 eq) and the solution was warmed to 23° C. and stirred for 16 hr. The reaction was quenched using sat'd NaHCO3 (aq) and most of the THF removed under reduced pressure. The aqueous layer was partitioned between EtOAc (100 mL), the organic layer washed with water, brine, dried, and concentrated. The crude reaction was purified using chromatography eluting with 20% EtOAc/Heptane giving 4-Bromo-5-methoxy-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrrolo[2,3-c]pyridine beige crystalline product (0.950 g, 2.53 mmol, 55%). MS ESI m/z 359.2 (M+2H)+. 1NMR (400 MHz, CDCl3) δ 8.46 (d, J=0.6 Hz 1H), 8.36 (s, 1H), 7.39 (d, J=3.2 Hz, 1H), 6.54 (dd, J=3.2 Hz, 0.6 Hz, 1H), 5.51 (s, 2H), 4.14 (s, 3H), 3.51 (m, 2H), 0.94 (m, 2H), 0.00 (s, 9H).

Provenance & Evidence