反应详情

Manganese(IV) oxide (1.53 g, 17.6 mmol) was added to a solution of (S)-tert-butyl 2-(7-(6-(2-((S)-1-(tert-butoxycarbonyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)naphthalen-2-yl)-4,5-dihydro-1H-naphtho[1,2-d]imidazol-2-yl)pyrrolidine-1-carboxylate (183 mg, 0.196 mmol) in DCM (5 mL) and the mixture was stirred overnight at room temperature. The reaction mixture was filtered through a pad of diatomaceous earth (CELITE®) and washed with a solution of methanol/DCM 1:1. The volatiles were removed under vacuum using a rotavap to afford (S)-tert-butyl 2-(7-(6-(2-((S)-1-(tert-butoxycarbonyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)naphthalen-2-yl)-1H-naphtho[1,2-d]imidazol-2-yl)pyrrolidine-1-carboxylate (163 mg) as tan solid. LC-MS retention time 1.523 min; m/z 699.53 (MH+). LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Waters Sunfire 5u C18 4.6×30 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 4 mL/min, a gradient of 100% Solvent A/0% Solvent B to 0% Solvent A/100% Solvent B, a gradient time of 2 min, a hold time of 1 min, and an analysis time of 3 min where Solvent A was 10% MeOH/90% H2O/0.1% TFA and Solvent B was 10% H2O/90% MeOH/0.1% TFA. MS data was determined using a MICROMASS® Platform for LC in electrospray mode.

1. filtrationThe reaction mixture was filtered through a pad of diatomaceous earth (CELITE®)
2. washwashed with a solution of methanol/DCM 1:1
3. customThe volatiles were removed under vacuum