Reacción #1110938

Ecuación de reacción

(2R)-2-phenylcarbonyloxypropyl (2S)-2-(tert-butoxycarbonyl)amino-3-(3,4-dihydroxyphenyl)propanoate

HCl 1,4-dioxane

Methanesulfonic acid

→

mesylate salt

(2R)-2-Phenylcarbonyloxypropyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)propanoate mesylate

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.STIRRINGwhile stirred at room temperature
2. 2
   ConcentraciónThe solution was concentrated under vacuum

Procedimiento

A solution of (2R)-2-phenylcarbonyloxypropyl (2S)-2-(tert-butoxycarbonyl)amino-3-(3,4-dihydroxyphenyl)propanoate is (10.5 g, 21.1 mmol) in 34 mL (6.0 eq) of 4.0 N HCl/1,4-dioxane was stirred at room temperature for 1 h. Methanesulfonic acid (1.48 mL, 22.8 mmol) was slowly added to the reaction mixture while stirred at room temperature. The solution was concentrated under vacuum to afford the anhydrous mesylate salt 1 as a brown solid.

Fuente