Triethylamine → HCID 69586491, compound

Participants

Reaction Steps

4-(7-Bromo-3-phenyl-3H-benzoimidazole-5-sulfonyl)-5-methylsulfanyl-thiophene-2-carboxylic acid methyl ester was prepared according to literature (Lam, P. Y. S. et al., Tetrahedron Letters, 42:3415 (2001)) using 4-(7-bromo-3H-benzoimidazole-5-sulfonyl)-5-methylsulfanyl-thiophene-2-carboxylic acid methyl ester (20 mg, 44.7 μmol, Example 38: step e), phenylboronic acid (11.4 mg, 93.5 μmol), Cu(OAc)2 (8.5 mg, 46.8 μmol), pyridine N-oxide (4.7 mg, 49.2 μmol), triethylamine (13 μL, 93.3 μmol), and CH2Cl2 (1.5 mL) in a loosely-capped, 1-dram vial. The reaction mixture was diluted in CH2Cl2 and washed with water and brine. The organic layer was dried over magnesium sulfate. Removal of solvents in vacuo followed by preparative TLC afforded the title compound as a brown oil (12 mg, 51%). ESI-MS (m/z): Calcd. for C20H15BrN2O4S3: 522.9 (M+1); found: 525.0.

Provenance & Evidence