m-Chloroperbenzoic acid → HCID 10595309, compound

Participants

Reaction Steps

Part A: A solution of 1.24 g of 1-(2-bromo-4-isopropyl-phenyl)-3-cyano-6-methyl-7-azaindole (Example 72) and 1.42 g of 85% 3-chloro-peroxybenzoic acid in 20 mL of chloroform was refluxed for 6 hrs. The mixture was cooled and washed first with 10% sodium bicarbonate solution, then with brine. The solution was dried (Na2SO4) and evaporated to give a residue. TLC on silica gel with 95:5 dichloromethane-methanol showed a trace spot at Rf 0.88 and a major spot at Rf 0.34. The material was purified by chromatography on silica gel with dichoromethane, followed by 1% methanol in dichloromethane, to give a trace of unchanged 1-(2-bromo-4-isopropylphenyl)-3-cyano-6-methyl-7-azaindole (Rf 0.88) and 0.92 g of 1-(2-bromo-4-isopropylphenyl)-3-cyano-6-methyl-7-azaindole 7-oxide (Rf0.34); mp 179.2°. Mass spec. (m+H)+=370.0559; calcd., 370.0555 (79Br).

Provenance & Evidence