Sodium triacetoxyborohydride → [2-(3'-Chloro-2,3,5,6-tetrahydro-[1,2']bipyrazinyl-4-yl)-ethyl]-methyl-carbamic acid t-butyl ester

Participants

Reaction Steps

Add methyl-(2-oxo-ethyl)-carbamic acid t-butyl ester (27.69 mmoles; 4.80 g) and 3′-chloro-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazine (25.17 mmoles; 5.00 g) to 1,2 dichloroethane (50.0 mL) on ice. Add sodium triacetoxyborohydride (32.7 mmoles; 6.93 g) in 3 portions. Stir the reaction mixture at room temperature overnight. Quench the reaction with water, separate the organic layer and concentrate. Wash in hexanes and filter to provide [2-(3′-chloro-2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-yl)-ethyl]-methyl-carbamic acid t-butyl ester as a clear oil.

Provenance & Evidence