Triphenylphosphine → HCID 22388036, compound

Participants

Reaction Steps

To a suspension of methyl 3-[2-chloro-4-hydroxybenzyl]-2-methyl-3H-imidazo[4,5-b]pyridine-5-carboxylate (240 mg), 3-thiophenemethanol (68 mg) and triphenylphosphine (218 mg) in dry dichloromethane were added to diethyl azodicarboxylate (139 mg) under ice-cooling. After 2 hr, the reaction mixture was stirred at room temperature. After 6 hr, to a suspension of 3-thiophenemethanol (34 mg) and triphenylphosphine (109 mg) in dry dichloromethane was added diethyl azodicarboxylate (69 mg) under ice-cooling. After 20 hr, the reaction mixture was subjected to flash silica gel chromatography (silica gel 60 ml, eluent: chloroform). The eluate was recrystallized from ethyl acetate to give the objective compound (143 mg) as colorless crystals.

Provenance & Evidence