Dimethylformamide → 1-(6-Chloro-benzo[b]thiophen-2-ylmethyl)-5-(2-methoxy-ethoxy)-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid ethyl ester

Participants

Reaction Steps

To a solution of 660 mg (2.497 mmol) 5-(2-Methoxy-ethoxy)-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid ethyl ester in 15 mL absolute DMF 24 mg (2.497 mmol) NaH (96%) were added in an argon atmosphere. The mixture was stirred for 30 min. at room temperature. 623 mg (2.497 mmol) 2-Bromomethyl-6-chloro-benzo[b]thiophene [prepared by adopting a procedure described by Ewing, William R. et al. in; PCT Int. Appl. (1999), 300 pp. WO 9937304 A1; and Ewing, William R. et al. PCT Int. Appl. (2001), 460 pp. WO 0107436 A2] were added and the mixture stirred for 1 h at room temperature. The solvent was removed in vacuo and the residue purified by preparative HPLC (eluent: CH3CN/H2O/0.1% CF3COOH). The fractions containing the product were combined, concentrated in vacuo and lyophilized. Yield: 900 mg.

Provenance & Evidence