sodium hydroxide; water in methanol 2.5 h;

1: N-(pyrazine-2-yl-carbonyl)-L-phenylalanine sodium salt With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate in dichloromethane T=0°C; 0.5 h; 2: (1R)-3-methyl-1-[(3aS,4S,6S,7aR)-3a,5,5-trimethythexahydro-4,6-methano-1,3,2-benzodioxa-borol-2-yl]butan-1-amine trifluoroacetate in dichloromethane T=0 - 25°C; 24 h;