1,4-Dioxane → Tert-butyl-3-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline-6-carbonyl)azetidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a flask containing tert-butyl 3-((4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)(hydroxy)methyl)azetidine-1-carboxylate (4.75 g, 8.85 mmol, Intermediate 13: step a) was added 1,4-dioxane (200 mL) and THF (100 mL) to give a homogeneous solution. Activated MnO2 (5.0 g, 57.5 mmol) was then introduced and the mixture was heated to 85° C. After 3 hours the reaction mixture was filtered through Celite® while still warm and rinsed with additional THF and concentrated. Chromatography on silica gel (10% acetone-hexane increasing to 25% acetone) provided the title compound as an off white solid.

Provenance & Evidence