Hydrochloric Acid → HCID 25020401, Verbindung

Beteiligte Stoffe

Reaktionsschritte

The product of Example 75 step i) (0.4 g), (S)-3-hydroxymethyl-piperazine-1-carboxylic acid, tert-butyl ester (0.83 g) and sodium triacetoxyborohydride (0.81 g) were stirred in dichloromethane (20 mL) at room temperature for 12 hours. A few drops of acetic acid were added and stirring continued for 12 hours. Methanol (10 ml) and sodium cyanoborohydride (0.70 g) were added and stirring continued for a further 12 hours. Methanol (10 ml) and 4M HCl in 1,4-dioxane (10 ml) were added and stirred for 12 hours. The volatiles were removed under vacuum, dilute aqueous ammonia was added and the mixture extracted into dichloromethane. The organics were combined and evaporated under reduced pressure. The residue was purified by HPLC to give the title compound (0.035 g) as a solid.

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