HCID 22145918, compound → HCID 22145707, compound

Participants

Reaction Steps

A solution of N-(2,6-dichloro-4-hydroxymethylphenyl)-3-cyclopentyloxy-4-methoxybenzamide (4.4 g; that is prepared as described in Example 9) in dichloromethane (30 mL) is treated with activated manganese dioxide (6.2 g), and the mixture is stirred at reflux for 24 hours. The mixture is filtered, the filtrate is evaporated, and the resulting residue is subjected to flash chromatography on silica gel, eluting with ethyl acetate, to give N-(2,6-dichloro-4-formylphenyl)-3-cyclopentyloxy-4-methoxy-benzamide (2.4 g), m.p. 96-98° C. [Elemental analysis: C, 59.0; H, 5.1; N, 3.1%. calculated: C, 58.8; H, 4.7; N, 3.4%].

Provenance & Evidence