1: 2-(3,5-difluorophenyl)acetic acid With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; 1 h; 2: N-(L-alanyl)-(2S)-2-phenylglycine tert-butyl ester With N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C;