Acetic Acid → methyl 14-cyclohexyl-6-[(1-methyl-1H-pyrazol-4-yl)methyl]-5,6,7,8-tetrahydroindolo[2,1-a][2,5]benzodiazocine-11-carboxylate

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Reaction Steps

To a solution of methyl 14-cyclohexyl-5,6,7,8-tetrahydroindolo[2,1-a][2,5]-benzodiazocine-11-carboxylate (prepared as described in Example 48, Step 3) in MeOH (0.06 M), 1-methyl-1H-pyrazole-4-carbaldehyde (3 eq) was added and the pH adjusted to pH 4 with acetic acid. The solution was stirred at RT for 30 mins before addition of NaBH3CN (1.5 eq). The reaction was stirred at RT for 16 h. The reaction was quenched with saturated aqueous NaHCO3 and extracted with EtOAc (×2). The combined organics were washed with brine, dried (Na2SO4), filtered and concentrated in vacuo to give the title compound as a viscous oil (quantitative); MS (ES+) m/z 483 (M+H)+

Provenance & Evidence