4-(5-Hydroxymethyl-imidazol-1-yl)-3,3-dimethyl-isochroman-1-one → 3-(3,3-dimethyl-1-oxo-isochroman-4-yl)-3H-imidazole-4-carbaldehyde

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 4-(5-hydroxymethyl-imidazol-1-yl)-3,3-dimethyl-isochroman-1-one (0.500 g, 1.84 mmol) (Example 6d) in dioxane (10 mL) is added manganese dioxide (2.4 g, 27.6 mmol) and the reaction mixture is heated to 60° C. overnight. Filtration through celite and concentration in vacuo afforded 3-(3,3-dimethyl-1-oxo-isochroman-4-yl)-3H-imidazole-4-carbaldehyde, which is used in the next step without further purification; MS (ESI) m/z 271.1 (M+H).

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